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System time

From Rosetta Code
Task
System time
You are encouraged to solve this task according to the task description, using any language you may know.
Task

Output the system time   (any units will do as long as they are noted) either by a system command or one built into the language.

The system time can be used for debugging, network information, random number seeds, or something as simple as program performance.


Related task


See also



11l 

print(Time())
Output:
2021-03-25 13:03:47.0505867

AArch64 Assembly

Works with: as version Raspberry Pi 3B version Buster 64 bits
/* ARM assembly AARCH64 Raspberry PI 3B */
/*  program sysTime64.s   */
 
/*******************************************/
/* Constantes file                         */
/*******************************************/
/* for this file see task include a file in language AArch64 assembly*/
.include "../includeConstantesARM64.inc"

.equ GETTIME,   169      // call system linux gettimeofday

/*******************************************/
/* Structures                               */
/********************************************/
/* example structure  time  */
    .struct  0
timeval_sec:                     //
    .struct  timeval_sec + 8 
timeval_usec:                     //
    .struct  timeval_usec + 8 
timeval_end:
    .struct  0
timezone_min:                     //
    .struct  timezone_min + 8 
timezone_dsttime:                 // 
    .struct  timezone_dsttime + 8 
timezone_end:

/*********************************/
/* Initialized data              */
/*********************************/
.data
szMessEmpty:       .asciz "Empty queue. \n"
szMessNotEmpty:    .asciz "Not empty queue. \n"
szMessError:       .asciz "Error detected !!!!. \n"
szMessResult:      .asciz "GMT: @/@/@  @:@:@  @ms\n"  // message result
 
szCarriageReturn:  .asciz "\n"
.align 4
tbDayMonthYear:    .quad  0,  31,  60,  91, 121, 152, 182, 213, 244, 274, 305, 335
                   .quad 366, 397, 425, 456, 486, 517, 547, 578, 609, 639, 670, 700
                   .quad 731, 762, 790, 821, 851, 882, 912, 943, 974,1004,1035,1065
                   .quad 1096,1127,1155,1186,1216,1247,1277,1308,1339,1369,1400,1430
/*********************************/
/* UnInitialized data            */
/*********************************/
.bss 
.align 4
stTVal:                .skip timeval_end
stTZone:               .skip timezone_end
sZoneConv:             .skip 100
/*********************************/
/*  code section                 */
/*********************************/
.text
.global main 
main:                             // entry of program 
    ldr x0,qAdrstTVal             // time zones
    ldr x1,qAdrstTZone
    mov x8,GETTIME                // call system 
    svc 0
    cmp x0,-1                     // error ?
    beq 99f
    ldr x1,qAdrstTVal
    ldr x0,[x1,timeval_sec]       // timestamp in second
    bl convTimeStamp
    //ldr x0,qTStest1
    //bl convTimeStamp
    //ldr x0,qTStest2
    //bl convTimeStamp
    //ldr x0,qTStest3
    //bl convTimeStamp
    b 100f
99:
    ldr x0,qAdrszMessError
    bl affichageMess 
100:                               // standard end of the program 
    mov x0,0                       // return code
    mov x8,EXIT                    // request to exit program
    svc 0                          // perform the system call

qAdrszMessError:          .quad szMessError
qAdrstTVal:               .quad stTVal
qAdrstTZone:              .quad stTZone
qAdrszMessResult:         .quad szMessResult
qAdrszCarriageReturn:     .quad szCarriageReturn
qTStest1:                 .quad 1609508339    // 01/01/2021
qTStest2:                 .quad 1657805939    // 14/07/2022
qTStest3:                 .quad 1767221999    // 31/12/2025
/******************************************************************/
/*     conversion timestamp to date                               */ 
/******************************************************************/
/* x0 contains the value of timestamp */
convTimeStamp:
    stp x1,lr,[sp,-16]!            // save  registers
    ldr x2,qSecJan2020
    sub x3,x0,x2                   // total secondes to 01/01/2020
    mov x4,60
    udiv x5,x3,x4
    msub x6,x5,x4,x3              // compute secondes
    udiv x3,x5,x4
    msub x7,x3,x4,x5              // compute minutes
    mov x4,24
    udiv x5,x3,x4
    msub x8,x5,x4,x3              // compute hours
    mov x4,(365 * 4 + 1)
    udiv x9,x5,x4
    lsl x9,x9,2                   // multiply by 4 = year1
    udiv x12,x5,x4
    msub x10,x12,x4,x5
    ldr x11,qAdrtbDayMonthYear
    mov x12,3
    mov x13,12
1:
    mul x14,x13,x12
    ldr x15,[x11,x14,lsl 3]         // load days by year
    cmp x10,x15
    bge 2f
    sub x12,x12,1
    cmp x12,0
    cbnz x12,1b
2:                                 // x12 = year2
    mov x16,11
    mul x15,x13,x12
    lsl x15,x15,3                  // * par 8
    add x14,x15,x11
3:
    ldr x15,[x14,x16,lsl 3]        // load days by month
    cmp x10,x15
    bge 4f
    sub x16,x16,1
    cmp x16,0
    cbnz x16,3b
4:                                 // x16 = month - 1
    mul x15,x13,x12
    add x15,x15,x16
    ldr x1,qAdrtbDayMonthYear
    ldr x3,[x1,x15,lsl 3]
    sub x0,x10,x3
    add x0,x0,1                    // final compute day
    ldr x1,qAdrsZoneConv
    bl conversion10
    ldr x0,qAdrszMessResult
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc          // insert result at first @ character
    mov x2,x0
    add x0,x16,1                   // final compute month
    ldr x1,qAdrsZoneConv
    bl conversion10
    mov x0,x2
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc          // insert result at next @ character
    mov x2,x0
    add x0,x9,2020
    add x0,x0,x12                  // final compute year = 2020 + year1 + year2
    ldr x1,qAdrsZoneConv
    bl conversion10
    mov x0,x2
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc          // insert result at next @ character
    mov x2,x0
    mov x0,x8                      // hours
    ldr x1,qAdrsZoneConv
    bl conversion10
    mov x0,x2
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc          // insert result at next @ character
    mov x2,x0
    mov x0,x7                      // minutes
    ldr x1,qAdrsZoneConv
    bl conversion10
    mov x0,x2
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc          // insert result at next @ character
    mov x2,x0
    mov x0,x6                      // secondes
    ldr x1,qAdrsZoneConv
    bl conversion10
    mov x0,x2
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc          // insert result at next @ character
    mov x2,x0
    ldr x1,qAdrstTVal
    ldr x0,[x1,timeval_usec]       // millisecondes
    ldr x1,qAdrsZoneConv
    bl conversion10
    mov x0,x2
    ldr x1,qAdrsZoneConv
    bl strInsertAtCharInc          // insert result at next @ character
    bl affichageMess 
    b 100f
99:
    ldr x0,qAdrszMessError
    bl affichageMess 
100:
    ldp x1,lr,[sp],16              // restaur  2 registers
    ret                            // return to address lr x30
qAdrsZoneConv:            .quad sZoneConv
qSecJan2020:              .quad 1577836800
qAdrtbDayMonthYear:       .quad tbDayMonthYear
/********************************************************/
/*        File Include fonctions                        */
/********************************************************/
/* for this file see task include a file in language AArch64 assembly */
.include "../includeARM64.inc"
Output:
GMT: 28/3/2020  20:29:58  862484ms

ABAP 

REPORT system_time.

WRITE: sy-uzeit.

Ada

The following example displays a date-time stamp. The time zone value is the number of minutes offset from the prime meridian.

with Ada.Calendar; use Ada.Calendar;
with Ada.Calendar.Formatting; use Ada.Calendar.Formatting;
with Ada.Calendar.Time_Zones; use Ada.Calendar.Time_Zones;
with Ada.Text_Io; use Ada.Text_Io;
 
procedure System_Time is
   Now : Time := Clock;
begin
   Put_line(Image(Date => Now, Time_Zone => -7*60));
end System_Time;
Output:
2008-01-23 19:14:19

Aime 

date d;

d_now(d);

o_form("~-/f2/-/f2/ /f2/:/f2/:/f2/\n", d_year(d), d_y_month(d), d_m_day(d),
       d_d_hour(d), d_h_minute(d), d_m_second(d));
Output:
2011-09-04 15:05:08

ALGOL 68

Works with: ALGOL 68G version Any - tested with release mk15-0.8b.fc9.i386
FORMAT time repr = $"year="4d,", month="2d,", day="2d,", hours="2d,",  \
                   minutes="2d,", seconds="2d,", day of week="d,",  \
                   daylight-saving-time flag="dl$;
printf((time repr, local time));
printf((time repr, utc time))
Output:
year=2009, month=03, day=12, hours=11, minutes=53, seconds=32, day of week=5, daylight-saving-time flag=0
year=2009, month=03, day=12, hours=01, minutes=53, seconds=32, day of week=5, daylight-saving-time flag=0

AmigaBASIC 

print date$,time$
Output:
11-19-2020    20:47:44

AppleScript 

display dialog ((current date) as text)
Output:
 Sunday, August 14, 2011 10:43:57 PM

macOS's system time epoch is 1st January 2001 00:00:00 UTC. The number of seconds since then can be calculated in vanilla AppleScript like this: 

set now to (current date)
set GMTOffset to (time to GMT)
copy now to epoch
tell epoch to set {its day, its month, its year, its time} to {1, January, 2001, 0}
set systemTime to now - GMTOffset - epoch

-- Format output:
set offsetStr to GMTOffset div hours * 100 + GMTOffset mod hours div minutes
if (GMTOffset < 0) then
    set offsetStr to " -" & text 3 thru -1 of ((-10000 + offsetStr) as text)
else
    set offsetStr to " +" & text 2 thru -1 of ((10000 + offsetStr) as text)
end if
return (now as text) & offsetStr & (linefeed & systemTime) & (" seconds since " & epoch & " UTC")
Output:
"Tuesday 30 June 2020 at 11:34:31 +0100
6.15206071E+8 seconds since Monday 1 January 2001 at 00:00:00 UTC"

With AppleScriptObjC, it's more direct and fractions of a second are included: 

use AppleScript version "2.4" -- Mac OS 10.10 (Yosemite) or later.
use framework "Foundation"

set now to current application's class "NSDate"'s |date|()
set systemTime to now's timeIntervalSinceReferenceDate()
-- Or, since timeIntervalSinceReferenceDate() is both an instance method and a class method:
-- set systemTime to current application's class "NSDate"'s timeIntervalSinceReferenceDate()

-- Format output:
set currentLocale to current application's class "NSLocale"'s currentLocale()
set nowAsText to (now's descriptionWithLocale:(currentLocale)) as text
set epoch to now's dateByAddingTimeInterval:(-systemTime)
-- Or:
-- set epoch to current application's class "NSDate"'s dateWithTimeIntervalSinceReferenceDate:(0)
set epochAsText to epoch's |description|() as text
return nowAsText & (linefeed & systemTime) & (" seconds since " & epochAsText)
Output:
"Tuesday 30 June 2020 at 11:34:34 British Summer Time
6.152060746444E+8 seconds since 2001-01-01 00:00:00 +0000"

ARM Assembly

Works with: as version Raspberry Pi
/* ARM assembly Raspberry PI  */
/*  program sysTime.s   */

/* REMARK 1 : this program use routines in a include file 
   see task Include a file language arm assembly 
   for the routine affichageMess conversion10 
   see at end of this program the instruction include */

/*******************************************/
/* Constantes                              */
/*******************************************/
.equ STDOUT, 1           @ Linux output console
.equ EXIT,   1           @ Linux syscall
.equ WRITE,  4           @ Linux syscall
.equ BRK,    0x2d        @ Linux syscall
.equ CHARPOS,     '@'

.equ GETTIME,   0x4e     @ call system linux gettimeofday

/*******************************************/
/* Structures                               */
/********************************************/
/* example structure  time  */
    .struct  0
timeval_sec:                     @
    .struct  timeval_sec + 4 
timeval_usec:                     @
    .struct  timeval_usec + 4 
timeval_end:
    .struct  0
timezone_min:                     @
    .struct  timezone_min + 4 
timezone_dsttime:                 @ 
    .struct  timezone_dsttime + 4 
timezone_end:

/*********************************/
/* Initialized data              */
/*********************************/
.data
szMessError:       .asciz "Error detected !!!!. \n"
szMessResult:      .asciz "GMT: @/@/@  @:@:@  @ms\n"  @ message result
 
szCarriageReturn:  .asciz "\n"
.align 4
tbDayMonthYear:    .int  0,  31,  60,  91, 121, 152, 182, 213, 244, 274, 305, 335
                   .int 366, 397, 425, 456, 486, 517, 547, 578, 609, 639, 670, 700
                   .int 731, 762, 790, 821, 851, 882, 912, 943, 974,1004,1035,1065
                   .int 1096,1127,1155,1186,1216,1247,1277,1308,1339,1369,1400,1430
/*********************************/
/* UnInitialized data            */
/*********************************/
.bss 
.align 4
stTVal:                .skip timeval_end
stTZone:               .skip timezone_end
sZoneConv:             .skip 100
/*********************************/
/*  code section                 */
/*********************************/
.text
.global main 
main:                              @ entry of program 
    ldr r0,iAdrstTVal
    ldr r1,iAdrstTZone
    mov r7,#GETTIME
    svc 0
    cmp r0,#-1                     @ error ?
    beq 99f
    ldr r0,iAdrstTVal
    ldr r1,[r0,#timeval_sec]       @ timestemp in second
    //ldr r1,iTStest1
    //ldr r1,iTStest2
    //ldr r1,iTStest3
    ldr r2,iSecJan2020
    sub r0,r1,r2                   @ total secondes to 01/01/2020
    mov r1,#60
    bl division
    mov r0,r2
    mov r6,r3                      @ compute secondes
    mov r1,#60
    bl division
    mov r7,r3                      @ compute minutes
    mov r0,r2
    mov r1,#24
    bl division
    mov r8,r3                      @ compute hours
    mov r0,r2
    mov r11,r0
    mov r1,#(365 * 4 + 1)
    bl division
    lsl r9,r2,#2                   @ multiply by 4 = year1
    mov r1,#(365 * 4 + 1)
    mov r0,r11
    bl division
    mov r10,r3
    ldr r1,iAdrtbDayMonthYear
    mov r2,#3
    mov r3,#12
1:
    mul r11,r3,r2
    ldr r12,[r1,r11,lsl #2]         @ load days by year
    cmp r10,r12
    bge 2f
    sub r2,r2,#1
    cmp r2,#0
    bne 1b
2:                                 @ r2 = year2
    mov r5,#11
    mul r4,r3,r2
    lsl r4,#2
    add r4,r1
3:
    ldr r12,[r4,r5,lsl #2]         @ load days by month
    cmp r10,r12
    bge 4f
    subs r5,r5,#1
    bne 3b
4:                                 @ r5 = month - 1
    mul r11,r3,r2
    add r11,r5
    ldr r1,iAdrtbDayMonthYear
    ldr r3,[r1,r11,lsl #2]
    sub r0,r10,r3

    add r0,r0,#1                   @ final compute day
    ldr r1,iAdrsZoneConv
    bl conversion10                @ this function do not zero final
    mov r4,#0                      @ store zero final
    strb r4,[r1,r0]
    ldr r0,iAdrszMessResult
    ldr r1,iAdrsZoneConv
    bl strInsertAtCharInc          @ insert result at first @ character
    mov r3,r0
    add r0,r5,#1                   @ final compute month
    ldr r1,iAdrsZoneConv
    bl conversion10
    mov r4,#0                      @ store zero final
    strb r4,[r1,r0]
    mov r0,r3
    ldr r1,iAdrsZoneConv
    bl strInsertAtCharInc          @ insert result at next @ character
    mov r3,r0
    ldr r11,iYearStart
    add r0,r9,r11
    add r0,r0,r2                   @ final compute year = 2020 + year1 + year2
    ldr r1,iAdrsZoneConv
    bl conversion10
    mov r4,#0                      @ store zero final
    strb r4,[r1,r0]
    mov r0,r3
    ldr r1,iAdrsZoneConv
    bl strInsertAtCharInc          @ insert result at next @ character
    mov r3,r0
    mov r0,r8                      @ hours
    ldr r1,iAdrsZoneConv
    bl conversion10
    mov r4,#0                      @ store zero final
    strb r4,[r1,r0]
    mov r0,r3
    ldr r1,iAdrsZoneConv
    bl strInsertAtCharInc          @ insert result at next @ character
    mov r3,r0
    mov r0,r7                      @ minutes
    ldr r1,iAdrsZoneConv
    bl conversion10
    mov r4,#0                      @ store zero final
    strb r4,[r1,r0]
    mov r0,r3
    ldr r1,iAdrsZoneConv
    bl strInsertAtCharInc          @ insert result at next @ character
    mov r3,r0
    mov r0,r6                      @ secondes
    ldr r1,iAdrsZoneConv
    bl conversion10
    mov r4,#0                      @ store zero final
    strb r4,[r1,r0]
    mov r0,r3
    ldr r1,iAdrsZoneConv
    bl strInsertAtCharInc          @ insert result at next @ character
    mov r3,r0
    ldr r1,iAdrstTVal
    ldr r0,[r1,#timeval_usec]      @ millisecondes
    ldr r1,iAdrsZoneConv
    bl conversion10
    mov r4,#0                      @ store zero final
    strb r4,[r1,r0]
    mov r0,r3
    ldr r1,iAdrsZoneConv
    bl strInsertAtCharInc          @ insert result at next @ character
    bl affichageMess 
    b 100f
99:
    ldr r0,iAdrszMessError
    bl affichageMess 
100:                               @ standard end of the program 
    mov r0,#0                      @ return code
    mov r7,#EXIT                   @ request to exit program
    svc 0                          @ perform the system call

iAdrszMessError:          .int szMessError
iAdrstTVal:               .int stTVal
iAdrstTZone:              .int stTZone
iAdrszMessResult:         .int szMessResult
iAdrszCarriageReturn:     .int szCarriageReturn
iAdrsZoneConv:            .int sZoneConv
iSecJan2020:              .int 1577836800
iAdrtbDayMonthYear:       .int tbDayMonthYear
iYearStart:               .int 2020
iTStest1:                 .int 1609508339    @ 01/01/2021
iTStest2:                 .int 1657805939    @ 14/07/2022
iTStest3:                 .int 1767221999    @ 31/12/2025
/***************************************************/
/*      ROUTINES INCLUDE                 */
/***************************************************/
.include "../affichage.inc"
Output:
GMT: 29/3/2020  18:39:13  717877ms

Arturo 

print now
Output:
2021-02-20T11:10:08+01:00


Asymptote 

time();
time("%a %b %d %H:%M:%S %Z %Y");
//are equivalent ways of returning the current time in the default format used by the UNIX date command.

See time() in the Asymptote manual.


AutoHotkey 

FormatTime, t
MsgBox,% t
Output:
 4:18 PM Saturday, May 30, 2009

AutoIt 

MsgBox(0,"Time", "Year: "&@YEAR&",Day: " &@MDAY& ",Hours: "& @HOUR & ", Minutes: "& @MIN &", Seconds: "& @SEC)
Output:
 Year: 2011,Day: 05,Hour: 09, Minutes: 15, Seconds: 25

Avail

The method now retrieves the current timestamp. 

Print: “now”;

AWK

One-liner:

Works with: Gawk
$ awk 'BEGIN{print systime(),strftime()}'
Output:
1242401632 Fri May 15 17:33:52  2009

Solution for other awk-versions:

Works with: awk
function dos_date(  cmd,d,t,x) { 	# under MS Windows 
#   cmd = "DATE /T"
#   cmd | getline d	# Format depends on locale, e.g. MM/DD/YYYY or YYYY-MM-DD
#   close(cmd)        	# close pipe
# ##print d
#   cmd = "TIME /T"
#   cmd | getline t   	# 13:59
#   close(cmd) 		
# ##print t
#   return d t

    cmd = "echo %DATE% %TIME%"		# this gives better time-resolution
    cmd | getline x   			# 2014-10-31 20:57:36.84
    close(cmd)
    return x
}
BEGIN {
   print "Date and time:", dos_date()
  #print systime(), strftime()		# gawk only
}
Output:
2014-10-31 20:57:36.84

See also: System_time#Batch, Discordian_date

BaCon 

' BaCon time
n = NOW
PRINT n, " seconds since January 1st, 1970"
PRINT YEAR(n), MONTH(n), DAY(n) FORMAT "%04d/%02d/%02d "
PRINT HOUR(n), MINUTE(n), SECOND(n) FORMAT "%02d:%02d:%02d\n"
Output:
1503869183 seconds since January 1st, 1970
2017/08/27 17:26:23

BASIC

Works with: QBasic

This shows the system time in seconds since midnight. 

PRINT TIMER

This shows the time in human-readable format (using a 24-hour clock): 

PRINT TIME$

Commodore BASIC

TI$ and TI

Commodore BASIC maintains both a 24-hour clock as TI$ and a jiffy clock (1 jiffy = 1/60 seconds) as the variable TIME. Since Commodore BASIC recognizes only the first two letters of a variable identifier, TIME$, TIMPANI$, and TIMBUKTU$ would all refer to the time keeping variable of TI$.

Notes about the two variables:

  • TI$ counts in standard time format of HHMMSS from 00:00:00 to 23:59:59 after which it will reset back to 00:00:00. On certain CBM/PET computers, TI$ is seven digits to include 1/10 seconds at the end.
  • TI$ is both read and write capable. The user can initialize the clock to any valid time within the 24 hour range by assigning it a string value of the time, e.g. TI$ = "111530" for 11:15:30. Assigning improper values (e.g. "089900" as 99 minutes after 8 o'clock) will result in automatic correction for the true time (09:39:00). Unfortunately there is no tracking of overflow in the hours to keep track of days, etc.
  • TI is read only, but always reflects the jiffy equivalent to the value in TI$, that is: TI = (HH × 216,000) + (MM × 3600) + (SS × 60) + JIFFIES. TI can be set or reset to a value by setting TI$ to the equivalent HHMMSS time, although resolution to specific jiffies is not possible with this method.
  • Particularly on the Commodore 64, the timer handler is driven off of a CIA chip interrupt, but is in no way tied to any of the time-of-day clocks built into the CIA (see below.)
  • Because the clock is managed by the KERNAL operating system, the clock will loose time during certain I/O processes, such as disk access, etc. when the interrupt is unable to be processed on time.


Code Examples 

1 rem time since last reset
5 print chr$(147);chr$(14);
10 t$=ti$
20 h$=left$(t$,2)
30 m$=mid$(t$,3,2)
40 s$=right$(t$,2)
50 print chr$(19);"Roughly ";tab(9);h$;" hours "
51 print tab(9);m$;" minutes"
52 print tab(9);s$; " seconds":print
60 print "has elapsed since TI$ was last reset or"
65 print "the system was powered on.":print
70 print "Press any key to quit."
80 get k$:if k$="" then goto 10
5 rem set time to current time of day
10 print chr$(147);
20 input "Enter hour of day (0-23)";h$
25 if val(h$)<0 or val(h$)>23 then goto 20
30 input "Enter minutes (0-59)";m$
35 if val(m$)<0 or val(m$)>99 then goto 30
40 input "Enter seconds (0-59)";s$
45 if val(s$)<0 or val(s$)>99 then goto 40
60 ti$=h$+m$+s$
70 print chr$(147);
80 print chr$(19);"The time is now: ";ti$
85 print:print "Press any key to end."
90 get k$:if k$="" then 80
100 end


Time of Day Clocks

The Commodore 64 and 128 models each have two MOS 6526 Complex Interface Adapters (CIA) that each have Time of Day (TOD) clocks. Interestingly, these clocks are not used to drive the internal variables TI and TI$. The advantage of these clocks is that they will continue to count time independent of the operating system, and therefore do not lose time during the same I/O operations that affect TI and TI$.

The time is represented in Binary Coded Decimal, and a separate register is used to access hours, minutes, seconds, and 1/10 seconds.

Reading the HOURS register will suspend further updates to all of the TOD registers to allow the program to accurately read the complete time. The clock itself does not stop. Once the 1/10 register is read, updates to the registers will continue. If the programmer intends to read only the hours of a running clock, a subsequent read of the 1/10 register must be performed to resume updating of the registers.

Writing to the HOURS register will stop the clock completely. The clock will start only when the 1/10 register is written to, even with a zero.

Code Example - Commodore 64/128 Only 

1 rem read and set cia time of day clock
2 rem rosetta code commodore 64/128 example
10 print chr$(147);chr$(14)
15 hr=56331:mr=56330:sr=56329:tr=56328:gosub 300
20 print spc(11);"CIA #1 Time of Day"
21 print:print "Press S to start or stop the clock."
22 print "Press T to change the time."
23 print:print "Press Q to quit.":print
25 h=peek(hr):m=peek(mr):s=peek(sr):th=peek(tr):t=h:gosub 200
35 print chr$(19);:for q=1 to 8:print chr$(17);:next q
36 print "Clock is:";tab(12);cl$(b):print
40 print "Hours:";tab(12);h;". "
45 print "Minutes:";tab(12);m;". "
50 print "Seconds:";tab(12);s;". "
55 print "1/10 Sec.:";tab(12);th;". "
60 print "AM or PM? ";tab(13);ap$
65 get k$:if k$="" then goto 25
70 if k$="s" and b=0 then poke tr,0:b=1:goto 25
75 if k$="s" and b=1 then poke hr,t:b=0:goto 25
80 if k$="t" then gosub 400:goto 20
90 if k$="q" then end
100 goto 25

200 rem decode bcd
210 ap$="AM":if (h and 128)=128 then ap$="PM"
220 s=int((s and 112)/16)*10+(s and 15)
230 m=int((m and 112)/16)*10+(m and 15)
240 h=int((h and 48)/16)*10+(h and 15)
250 return

300 rem decide if clock is running
305 cl$(0)="Stopped":cl$(1)="Running":b=0
301 rem latch, read/resume
310 z=peek(hr):t1=peek(tr)
315 for i=1 to 100:next i
320 z=peek(hr):t2=peek(tr)
325 if t1<>t2 then b=1
330 return

400 rem change clock value
405 print chr$(147)
410 input "Hour";nh$
415 if val(nh$)<1 or val(nh$)>12 then goto 410
416 if val(nh$)<10 then nh$="0"+nh$
420 input "Minutes";nm$
425 if val(nm$)<0 or val(nm$)>59 then goto 420
426 if val(nm$)<10 then nm$="0"+nm$
430 input "Seconds";ns$
435 if val(ns$)<0 or val(ns$)>59 then goto 430
436 if val(ns$)<10 then ns$="0"+ns$
440 print "AM or PM (a,p)? ";
445 get ap$:if ap$<>"a" and ap$<>"p" then 445
446 print ap$
450 ap=0:if ap$="p" then ap=128

455 rem convert input to bcd
457 ns=val(mid$(ns$,1,1))*16+val(mid$(ns$,2,1))
460 nm=val(mid$(nm$,1,1))*16+val(mid$(nm$,2,1))
465 nh=val(mid$(nh$,1,1))*16+val(mid$(nh$,2,1))
470 nh=nh+ap

475 rem now set values into clock
480 poke hr,nh:rem set hour stops clock
485 poke mr,nm:rem set minute
490 poke sr,ns:rem set second
495 poke tr,0 :rem set 1/10 starts clock
497 b=1
499 print chr$(147):return


BASIC256 

print month+1; "-"; day; "-"; year
# returns system date in format: mm-dd-yyyy

print hour; ":"; minute; ":"; second
# returns system time in format: hh:mm:ss


Batch File

There is no way to get a computer-readable date or time representation in batch files. All output is human-readable and follows the current locale.

Both date and time have a /t argument which makes them output only the value instead of prompting for a new one as well.

Works with: Windows NT
date /t
time /t

Furthermore there are two pseudo-variables %DATE% and %TIME%:

Works with: Windows NT version 4
echo %DATE% %TIME%

BBC BASIC 

      PRINT TIME$

Outputs the date and time. To output only the time:

      PRINT RIGHT$(TIME$,8)

BQN

The system value •UnixTime whenever called, gives time between the unix epoch the time the function was called, where the Unix epoch is 1970-01-01 00:00:00 UTC. bqn-libs/datetime.bqn has some functions for the manipulation of the given timestamp. 

•Show •UnixTime @

C

This probably isn't the best way to do this, but it works.

It shows system time as "Www Mmm dd hh:mm:ss yyyy", where Www is the weekday, Mmm the month in letters, dd the day of the month, hh:mm:ss the time, and yyyy the year.

#include<time.h>
#include<stdio.h>
#include<stdlib.h>
int main(){
  time_t my_time = time(NULL);
  printf("%s", ctime(&my_time));
  return 0;
}

C# 

Console.WriteLine(DateTime.Now);

C++

to be compiled under linux with g++ -lboost_date_time systemtime.cpp -o systemtime( or whatever you like) 

#include <iostream>
#include <boost/date_time/posix_time/posix_time.hpp>

int main( ) {
   boost::posix_time::ptime t ( boost::posix_time::second_clock::local_time( ) ) ;
   std::cout << to_simple_string( t ) << std::endl ;
   return 0 ;
}

C++ 11

#include <chrono>
#include <ctime> //for conversion std::ctime()
#include <iostream>

int main() {
    auto timenow = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
    std::cout << std::ctime(&timenow) << std::endl;
}
Output:
 Thu Dec 26 13:51:00 2013

Clojure 

(import '[java.util Date])
; the current system date time string
(print (new Date))
; the system time as milliseconds since 1970
(print (. (new Date) getTime))
; or
(print (System/currentTimeMillis))

CLU 

start_up = proc ()
    stream$putl(stream$primary_output(), date$unparse(now()))
end start_up
Output:
19 December 2021 01:50:11

COBOL 

       WORKING-STORAGE SECTION.
       01  WS-CURRENT-DATE-FIELDS.
           05  WS-CURRENT-DATE.
               10  WS-CURRENT-YEAR    PIC  9(4).
               10  WS-CURRENT-MONTH   PIC  9(2).
               10  WS-CURRENT-DAY     PIC  9(2).
           05  WS-CURRENT-TIME.
               10  WS-CURRENT-HOUR    PIC  9(2).
               10  WS-CURRENT-MINUTE  PIC  9(2).
               10  WS-CURRENT-SECOND  PIC  9(2).
               10  WS-CURRENT-MS      PIC  9(2).
           05  WS-DIFF-FROM-GMT       PIC S9(4).
 
       PROCEDURE DIVISION.
           MOVE FUNCTION CURRENT-DATE TO WS-CURRENT-DATE-FIELDS.

ColdFusion

Script Based CFML

<cfscript>
  // Date Time
  currentTime = Now();
  writeOutput( currentTime );

  // Epoch
  // Credit for Epoch time should go to Ben Nadel
  // bennadel.com is his blog
  utcDate = dateConvert( "local2utc", currentTime );
  writeOutput( utcDate.getTime() );
</cfscript>
Output:
Current DateTime: {ts '2017-06-06 10:36:28'}
Epoch: 1496763388434

Common Lisp 

(multiple-value-bind (second minute hour day month year) (get-decoded-time)
 	  (format t "~4,'0D-~2,'0D-~2,'0D ~2,'0D:~2,'0D:~2,'0D" year month day hour minute second))

Crystal 

# current time in system's time zone:
Time.local

# current time in UTC
Time.utc

# monotonic time (useful for measuring elapsed time)
Time.monotonic

D

Works with: Tango

Clock.now.span in the example below returnes the time-span since 1 Jan 1 A.D. Days are used in the example, but lower units are available, with the lowest being nanoseconds (nanos field). 

Stdout(Clock.now.span.days / 365).newline;

DBL 

XCALL TIME (D6)    ;D6=hhmmss

DCL 

$ start_time = f$time()
$ wait 0::10
$ end_time = f$time()
$ write sys$output "start time was ", start_time
$ write sys$output "end time was   ", end_time
$ write sys$output "delta time is         ", f$delta_time( start_time, end_time )
Output:
$ @system_time
start time was  4-JUN-2015 15:38:09.60
end time was    4-JUN-2015 15:38:19.60
delta time is            0 00:00:10.00

The alternative below doesn't facilitate the calculation of the delta time;

Output:
$ show time
   4-JUN-2015 15:33:33

Delphi 

lblDateTime.Caption := FormatDateTime('dd mmmm yyyy hh:mm:ss', Now);

This populates a label with the date

DuckDB

Works with: DuckDB version V1.1

`now()` and `get_current_time()` actually refer to the start of the current transaction: 

D select now();
┌────────────────────────────┐
│           now()            │
│  timestamp with time zone  │
├────────────────────────────┤
│ 2024-11-03 07:32:37.521+00 │
└────────────────────────────┘

D select get_current_time();
┌────────────────────┐
│ get_current_time() │
│        time        │
├────────────────────┤
│ 07:35:12.703       │
└────────────────────┘

DuckDB also provides several functions for converting times (TIMESTAMPTZ) to milliseconds and other units since the epoch, e.g. 

D select epoch_ms(now());
┌─────────────────┐
│ epoch_ms(now()) │
│      int64      │
├─────────────────┤
│   1730619679244 │
└─────────────────┘

DWScript 

PrintLn(FormatDateTime('dd mmmm yyyy hh:mm:ss', Now));

E 

println(timer.now())

The value is the number of milliseconds since 1970.

EasyLang 

print timestr systime

Ecstasy 

module WhatTimeIsIt {
    @Inject Clock clock;
    @Inject Console console;

    void run() {
        console.print($"current time: {clock.now}");
    }
}
Output:
current time: 2024-04-30 19:40:57.124

Elena

ELENA 4.x : 

import extensions;
import system'calendar;
 
public program()
{
    console.printLine(Date.Now);
}
Output:
01.10.2017 18:02:43

Elixir 

:os.timestamp                   # => {MegaSecs, Secs, MicroSecs}
:erlang.time                    # => {Hour, Minute, Second}
:erlang.date                    # => {Year, Month, Day}
:erlang.localtime               # => {{Year, Month, Day}, {Hour, Minute, Second}}
:erlang.universaltime           # => {{Year, Month, Day}, {Hour, Minute, Second}}

:calendar.local_time            # => {{Year, Month, Day}, {Hour, Minute, Second}}
:calendar.universal_time        # => {{Year, Month, Day}, {Hour, Minute, Second}}

It is also guaranteed that subsequent calls to this BIF returns continuously increasing values. Hence, the return value from :erlang.now() can be used to generate unique time-stamps, and if it is called in a tight loop on a fast machine the time of the node can become skewed. 

:random.seed(:erlang.now)

Emacs Lisp 

(message "%s" (current-time-string))
;; => "Wed Oct 14 22:21:05 1987"

current-time is the main programmatic interface, with various functions available to format or operate on the time values list it gives.

Erlang

By default, Erlang timestamps are turned in the {megasecs, secs, microsecs} format.

1> os:timestamp().
{1250,222584,635452}

These can be changed with the calendar module:

2> calendar:now_to_datetime(os:timestamp()). 
{{2009,8,14},{4,3,24}}
3> calendar:now_to_universal_time(os:timestamp()). 
{{2009,8,14},{4,3,40}}
4> calendar:now_to_local_time(os:timestamp()).    
{{2009,8,14},{0,7,01}}

Note that you will often encounter the function erlang:now/0 giving a time similar to the system time. However, erlang:now/0 may get delayed if the system time changes suddenly (i.e.: coming back from sleep mode). The delay is in place to make sure receive clauses that are millisecond-sensitive do not get false timeouts.

Excel

NOW() returns the date and time to the minute.

Type in a cell :

=NOW()
Output:
9-8-2013 17:33

F# 

printfn "%s" (System.DateTime.Now.ToString("u"))
Output:
 2013-09-19 23:56:50Z

Factor 

USE: calendar

now .

Falcon 

/* Added by Aykayayciti Earl Lamont Montgomery
April 10th, 2018 */

> CurrentTime().toString()
Output:
2018-04-10 09:40:35.798
[Finished in 0.2s]

Fantom

DateTime.now returns the current time, which can then be formatted into different styles. For example, toJava returns the current time in milliseconds since 1 Jan 1970.

DateTime.nowTicks returns the number of nanoseconds since 1 Jan 2000 UTC.

fansh> DateTime.nowTicks
351823905158000000
fansh> DateTime.now
2011-02-24T00:51:47.066Z London
fansh> DateTime.now.toJava
1298508885979

Forth

Forth's only standard access to the system timers is via DATE&TIME ( -- s m h D M Y ) and MS ( n -- ) which pauses the program for at least n milliseconds. Particular Forth implementations give different access to millisecond and microsecond timers:

Works with: Win32Forth
Works with: GNU Forth
Works with: bigFORTH
Works with: iForth
Works with: PFE
Works with: SwiftForth
Works with: VFX Forth
Works with: MacForth
[UNDEFINED] MS@ [IF]                                   \ Win32Forth (rolls over daily)
 [DEFINED] ?MS [IF] ( -- ms )
   : ms@ ?MS ;                                         \ iForth
 [ELSE] [DEFINED] cputime [IF] ( -- Dusec )
   : ms@ cputime d+ 1000 um/mod nip ;                  \ gforth: Anton Ertl
 [ELSE] [DEFINED] timer@ [IF] ( -- Dusec )
   : ms@ timer@ >us 1000 um/mod nip ;                  \ bigForth
 [ELSE] [DEFINED] gettimeofday [IF] ( -- usec sec )
   : ms@ gettimeofday 1000 MOD 1000 * SWAP 1000 / + ;  \ PFE
 [ELSE] [DEFINED] counter [IF]
   : ms@ counter ;                                     \ SwiftForth
 [ELSE] [DEFINED] GetTickCount [IF]
   : ms@ GetTickCount ;                                \ VFX Forth
 [ELSE] [DEFINED] MICROSECS [IF]
   : ms@  microsecs 1000 UM/MOD nip ;                  \  MacForth
[THEN] [THEN] [THEN] [THEN] [THEN] [THEN] [THEN]

MS@ .   \ print millisecond counter

Fortran

In ISO Fortran 90 or later, use the SYSTEM_CLOCK intrinsic subroutine:

integer :: start, stop, rate
real :: result
      
! optional 1st integer argument (COUNT) is current raw system clock counter value (not UNIX epoch millis!!)
! optional 2nd integer argument (COUNT_RATE) is clock cycles per second
! optional 3rd integer argument (COUNT_MAX) is maximum clock counter value
call system_clock( start, rate )
      
result = do_timed_work()
      
call system_clock( stop )
      
print *, "elapsed time: ", real(stop - start) / real(rate)

In ISO Fortran 95 or later, use the CPU_TIME intrinsic subroutine:

real :: start, stop
real :: result
      
! System clock value interpreted as floating point seconds
call cpu_time( start )
      
result = do_timed_work()
      
call cpu_time( stop )
      
print *, "elapsed time: ", stop - start

FreeBASIC 

' FB 1.05.0 Win64

Print Date + " " + Time  '' returns system date/time in format : mm-dd-yyyy hh:mm:ss
Sleep

Frink 

println[now[]]
Output:
AD 2020-06-24 PM 06:37:01.326 (Wed) Mountain Daylight Time

FutureBasic

Time can be configured from simple to specialized in FB. Here's the simplest way. 

window 1
print time
print time(@"hh:mm:ss"  )
print time(@"h:mm a"    )
print time(@"h:mm a zzz")
HandleEvents
Output:
19:30:58
07:30:58
7:30 PM
7:30 PM EDT

More accurate timing... 

window 1

print fn CFAbsoluteTimeGetCurrent
print fn CACurrentMediaTime
print fn ProcessInfoSystemUptime

HandleEvents

Gambas

Click this link to run this code 

Public Sub Main()

Print Format(Now, "dddd dd mmmm yyyy hh:nn:ss")

End

Output: 

Thursday 08 June 2017 15:58:41

Genie 

[indent=4]

init
    var now = new DateTime.now_local()
    print now.to_string()
Output:
prompt$ valac systemTime.gs
prompt$ ./systemTime
2019-06-01T13:07:54-0400

Go 

package main

import "time"
import "fmt"

func main() {
    t := time.Now()
    fmt.Println(t)                                    // default format
    fmt.Println(t.Format("Mon Jan  2 15:04:05 2006")) // some custom format
}

Groovy

Solution (based on Java solution).

def nowMillis = new Date().time
println 'Milliseconds since the start of the UNIX Epoch (Jan 1, 1970) == ' + nowMillis
Output:
Milliseconds since the start of the UNIX Epoch (Jan 1, 1970) == 1243395159250

GUISS

We can only show the clock, but this might not be set to system time:

Taskbar

Haskell 

import System.Time
       (getClockTime, toCalendarTime, formatCalendarTime)

import System.Locale (defaultTimeLocale)

main :: IO ()
main = do
  ct <- getClockTime
  print ct -- print default format, or
  cal <- toCalendarTime ct
  putStrLn $ formatCalendarTime defaultTimeLocale "%a %b %e %H:%M:%S %Y" cal

or with the time library: 

import Data.Time (getZonedTime, formatTime, defaultTimeLocale)

main :: IO ()
main = do
  zt <- getZonedTime
  print zt -- print default format, or
  putStrLn $ formatTime defaultTimeLocale "%a %b %e %H:%M:%S %Y" zt

HicEst 

seconds_since_midnight = TIME() ! msec as fraction

seconds_since_midnight = TIME(Year=yr, Day=day, WeekDay=wday, Gregorian=gday)
                             ! other options e.g. Excel, YYYYMMDD (num or text)

HolyC 

CDateStruct ds;
Date2Struct(&ds, Now + local_time_offset);

Print("%04d-%02d-%02d %02d:%02d:%02d\n", ds.year, ds.mon, ds.day_of_mon, ds.hour, ds.min, ds.sec);

Hoon

The time of the current system event is made available on the subject in most contexts as now. 

now
Output:
~2016.7.24..01.25.02..0f8e

Absolute times have 64-bit subsecond precision, which is used to ensure that no two system events have the same timestamp.

Icon and Unicon 

procedure main()

    write("&time - milliseconds of CPU time = ",&time)
    write("&clock - Time of day as hh:mm:ss (24-hour format) = ",&clock)
    write("&date - current date in yyyy/mm/dd format = ",&date)
    write("&dateline - timestamp with day of the week, date, and current time to the minute = ",&dateline)

    if find("Unicon",&version) then  
       write("&now - time in seconds since the epoch = ", &now)  # Unicon only

end
Output:
&time - milliseconds of CPU time = 0
&clock - Time of day as hh:mm:ss (24-hour format) = 15:56:14
&date - current date in yyyy/mm/dd format = 2011/06/06
&dateline - timestamp with day of the week, date, and current time to the minute = Monday, June 6, 2011  3:56 pm
&now - time in seconds since the epoch = 1307400974

IDL

The systime() function returns system time either as a formatted string (if the argument is zero or absent) or as a double-precision (floating-point) number of seconds (with fractionals) since 1-Jan-1970 otherwise: 

 print,systime(0)
    Wed Feb 10 09:41:14 2010
 print,systime(1)
      1.2658237e+009

The default format can also be invoked for a different moment in time by passing a different number of elapsed seconds to the routine as a second argument: 

 print,systime(0,1e9)
    Sat Sep 08 17:46:40 2001

Otherwise, the system time can be retrieved in Julian dates: 

 print,systime(/julian),format='(F15.7)'
    2455237.9090278

The local time zone is ignored if the utc flag is used: 

 print,systime()
    Wed Feb 10 09:50:15 2010
 print,systime(/utc)
    Wed Feb 10 17:50:10 2010

Io 

Date now println
Output:
2008-08-26 00:15:52 EDT

IS-BASIC 

100 PRINT TIME$

J

The external verb 6!:0 returns a six-element floating-point array in which the elements correspond to year, month, day, hour, minute, and second. Fractional portion of second is given to thousandths.

   6!:0 ''
2008 1 23 12 52 10.341

A formatted string representation of the current time can also be returned:

   6!:0 'YYYY-MM-DD hh:mm:ss.sss'
2009-08-26 10:38:53.171

Java

Works with: Java version 1.5+
public class SystemTime{
    public static void main(String[] args){
        System.out.format("%tc%n", System.currentTimeMillis());
    }
}
Output:
Mon Jun 21 13:02:19 BST 2010

Or using ZonedDateTime object:

import java.time.ZonedDateTime;

public class SystemTime{
   public static void main(String[] args){
      var now = ZonedDateTime.now();
      System.out.println(now);
   }
}

JavaScript 

console.log(new Date()) // => Sat, 28 May 2011 08:22:53 GMT
console.log(Date.now()) // => 1306571005417 // Unix epoch

Joy 

time localtime "%T\n" strftime putchars.

jq

Works with: jq version 1.5

Also works with gojq and jaq(*), the Go and Rust implementations of jq 

$ jq -n 'now | [., todate]'
[
  1437619000.970498,
  "2015-07-23T02:36:40Z"
]

"now" reports the number of seconds since the beginning of the Unix epoch.

(*) Note that jaq's `date` filter also includes sub-second details.

Jsish

Jsish does not implement the standard ECMAScript Date module but provides strftime and strptime. 

console.log(strftime());
Output:

using interactive echo of results 

prompt$ jsish
# strftime();
"2019-02-20 19:43:20"

Julia 

ts = time()

println("The system time is (in ISO 8601 format):")
println(strftime("    %F %T %Z", ts))
Output:
The system time is (in ISO 8601 format):
    2015-04-08 14:19:38 CDT

Kotlin 

// version 1.0.6

fun main(args: Array<String>) {
    println("%tc".format(System.currentTimeMillis()))
}

Lambdatalk 

{date}
-> 2021 02 22 07 23 12


Lasso 

date->format('%Q %T')
date->asInteger
Output:
2013-11-02 11:47:27
1383407747

LFE

Translation of: Erlang

By default, LFE timestamps are turned in the #(megasecs secs microsecs) format. 

> (os:timestamp)
#(1423 786308 145798)

These can be changed to the more common date/time stamp with the calendar module: 

> (calendar:now_to_datetime (os:timestamp)) 
#(#(2015 2 13) #(0 12 18))

Locale taken into account: 

> (calendar:now_to_universal_time (os:timestamp))
#(#(2015 2 13) #(0 13 51))
> (calendar:now_to_local_time (os:timestamp))
#(#(2015 2 12) #(16 14 26))

Note that you will often encounter the function erlang:now/0 giving a time similar to the system time. However, erlang:now/0 may get delayed if the system time changes suddenly (i.e.: coming back from sleep mode). The delay is in place to ensure that receive clauses which are millisecond-sensitive do not get false timeouts.

Liberty BASIC 

print time$()               'time now as string "16:21:44"
print time$("seconds")      'seconds since midnight as number 32314
print time$("milliseconds") 'milliseconds since midnight as number 33221342
print time$("ms")           'milliseconds since midnight as number 33221342

LIL

The system command is provided in the lil shell. On GNU/Linux: 

print [system date]; print [system date +%s.%N]

Fri Aug 23 20:50:08 EDT 2019

1566607808.225126400

Lingo 

put time()
-- "03:45"

put date()
-- "01.10.2016"

put the systemdate
-- date( 2016, 10, 1 )

put the systemdate.seconds
-- 13950

-- milliseconds since last boot, due to higher resolution better suited for random number seeding
put _system.milliseconds
-- 41746442

LiveCode 

put the system time

Locomotive Basic

The variable "time" contains the time elapsed since last system start or reset. Each unit equals 1/300 s.

print time
print time/300;"s since last reboot"

Works with: UCB Logo

Other Logo variants might have a built-in command, but UCB Logo must access the Unix shell to get time.

to time
  output first first shell [date +%s]
end

make "start time
wait 300              ; 60ths of a second
print time - :start   ; 5

Lua 

print(os.date())

M2000 Interpreter 

print str$(now,"long time"), time$(now)

Mathematica /Wolfram Language

Different ways of doing this, here are 2 most common:

Print[DateList[]]
Print[AbsoluteTime[]]

DateList will return the list {year,month,day,hour,minute,second} where all of them are integers except for second; that is a float. AbsoluteTime gives the total number of seconds since january 1st 1900 in your time zone.

MATLAB / Octave 

 datestr(now)

ans =
13-Aug-2010 12:59:56
 clock

ans =
2010     8     13      12      59     56.52

Maxima 

/* Time and date in a formatted string */
timedate();
"2012-08-27 20:26:23+10:00"

/* Time in seconds elapsed since 1900/1/1 0:0:0 */
absolute_real_time();

/* Time in seconds since Maxima was started */
elapsed_real_time();
elapsed_run_time();

Microsoft Small Basic

Date and time follows the user's locale. 

TextWindow.WriteLine(Clock.Date + " " + Clock.Time)
Output:
02/12/2022 8:27:15 PM
Press any key to continue...

min

Works with: min version 0.27.1
now datetime puts!
Output:
2021-01-09T17:41:59Z

Modula-2

Works with: ADW Modula-2 version any (Compile with the linker option Console Application).
MODULE Mytime;

FROM SysClock IMPORT
  GetClock, DateTime;
FROM STextIO IMPORT
  WriteString, WriteLn;
FROM FormatDT IMPORT
  DateTimeToString;

VAR
  CurrentTime: DateTime;
  DateStr, TimeStr: ARRAY [0 .. 20] OF CHAR;
BEGIN
  GetClock(CurrentTime);
  DateTimeToString(CurrentTime, DateStr, TimeStr);
  WriteString("Current time: ");
  WriteString(DateStr);
  WriteString(" ");
  WriteString(TimeStr);
  WriteLn;
END Mytime.

Modula-3 

MODULE MyTime EXPORTS Main;

IMPORT IO, FmtTime, Time;

BEGIN
  IO.Put("Current time: " & FmtTime.Long(Time.Now()) & "\n");
END MyTime.
Output:
Current time: Tue Dec 30 20:50:07 CST 2008

MUMPS

System time since midnight (in seconds) is kept in the second part of the system variable $HOROLOG.

SYSTIME
 NEW PH
 SET PH=$PIECE($HOROLOG,",",2)
 WRITE "The system time is ",PH\3600,":",PH\60#60,":",PH#60
 KILL PH
 QUIT

Usage:

USER>D SYSTIME^ROSETTA
The system time is 22:55:44

Nanoquery 

import Nanoquery.Util
println new(Date).getTime()

Neko 

/**
 <doc>
 <h2>System time</h2>
 <p>Neko uses Int32 to store system date/time values.
 And lib C strftime style formatting for converting to string form</p>
 </doc>
*/

var date_now = $loader.loadprim("std@date_now", 0)
var date_format = $loader.loadprim("std@date_format", 2)

var now = date_now()
$print(now, " ", date_format(now, "%T"), "\n")
Output:
prompt$ nekoc system-time.neko
prompt$ neko system-time.n
1542158592 20:23:12

Nemerle 

System.Console.Write(System.DateTime.Now);

NetRexx 

import java.text.SimpleDateFormat
say SimpleDateFormat("yyyy-MM-dd-HH.mm.ss.SSS").format(Date())

NewLISP 

> (date)
"Sun Sep 28 20:17:55 2014"

Nim 

import times

echo getDateStr()
echo getClockStr()
echo getTime()
echo now()  # shorthand for "getTime().local"
Output:
2021-04-21
00:28:01
2021-04-21T00:28:01+02:00
2021-04-21T00:28:01+02:00

Objeck 

function : Time() ~ Nil {
  t := Time->New();
  IO.Console->GetInstance()->Print(t->GetHours())->Print(":")->Print(t->GetMinutes())->Print(":")->PrintLine(t->GetSeconds());
}

Objective-C 

NSLog(@"%@", [NSDate date]);

or (deprecated)

NSLog(@"%@", [NSCalendarDate calendarDate]);

OCaml 

#load "unix.cma";;
open Unix;;
let {tm_sec = sec;
     tm_min = min;
     tm_hour = hour;
     tm_mday = mday;
     tm_mon = mon;
     tm_year = year;
     tm_wday = wday;
     tm_yday = yday;
     tm_isdst = isdst} = localtime (time ());;
Printf.printf "%04d-%02d-%02d %02d:%02d:%02d\n" (year + 1900) (mon + 1) mday hour min sec;

Oforth

System.tick is used to retrieve a tick from the system in order to compute small intervals of time. It is used by #bench method to compute duration of a runnable (unit is micro second). 

System.tick println
#[ #sqrt 1000000 seq map sum println ] bench
Output:
707095319487
666667166.458841
259819

System.localTime returns number of micro seconds since 01/01/1970:00:00:00 Integer returned by System.localTime allows to create a Date object. 

import: date

System.localTime dup println asDate println drop drop
Output:
1421095428478000
2015-01-12 21:43:48,478

Oz 

{Show {OS.time}}      %% posix time (seconds since 1970-01-01)
{Show {OS.gmTime}}    %% current UTC as a record
{Show {OS.localTime}} %% current local time as record

%% Also interesting: undocumented module OsTime
%% When did posix time reach 1 billion?
{Show {OsTime.gmtime 1000000000}}
{Show {OsTime.localtime 1000000000}}
Output:
1263347902
time(hour:1 isDst:0 mDay:13 min:58 mon:0 sec:22 wDay:3 yDay:12 year:110)
time(hour:2 isDst:0 mDay:13 min:58 mon:0 sec:22 wDay:3 yDay:12 year:110)
time(hour:1 isDst:0 mDay:9 min:46 mon:8 sec:40 wDay:0 yDay:251 year:101)
time(hour:3 isDst:1 mDay:9 min:46 mon:8 sec:40 wDay:0 yDay:251 year:101)

PARI/GP

For timing the gettime is usually used, which measures CPU time rather than walltime. But to get the raw time you'll need a system call 

system("date")

Direct access to the C library time() function can be had by an install(), and it should be faster than running the date program. 

install(time, "lf");
t = time();  
print(t);    \\ integer seconds since the epoch (usually 1 Jan 1970)

install() can't give the higher resolution C library time functions like gettimeofday() or clock_gettime() but some further C code could put their results into a Pari integer or rational suitable for install() in GP.

Pascal

Works with: Extended Pascal

Extended Pascal, as defined by the ISO standard 10206, defines a record data type that at least identifies the following members:

type
	timeStamp = packed record
			dateValid: Boolean;
			year: integer;
			month: 1..12;
			day: 1..31;
			timeValid: Boolean;
			hour: 0..23;
			minute: 0..59;
			second: 0..59;
		end;

A variable of this built-in data type can be populated with the getTimeStamp procedure as demostrated below:

program systemTime(output);
var
	ts: timeStamp;
begin
	getTimeStamp(ts);
	
	{
		If `getTimeStamp` is unable to obtain the time, it will
		set `timeValid` to `false` and `hour`, `minute` and
		`second` are set to a time representing midnight (0:00:00).
	}
	if ts.timeValid then
	begin
		writeLn(time(ts));
	end;
end.
Output:
20:10:42

The string representation generated by the standard function time is implementation-defined. The shown output was generated by a program compiled with the GPC, the GNU Pascal Compiler. A different processor might generate different output, for instance in an “AM”/“PM” format.

PascalABC.NET 

##
Print(DateTime.Now)


Perl

Simple localtime use in scalar context.

print scalar localtime, "\n";
Output:
Thu Jan 24 11:23:30 2008

localtime use in array context.

($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = localtime;
printf("%04d-%02d-%02d %02d:%02d:%02d\n", $year + 1900, $mon + 1, $mday, $hour, $min, $sec
Output:
2008-01-24 11:23:30

The same using DateTime:

use DateTime;
my $dt = DateTime->now;
my $d = $dt->ymd;
my $t = $dt->hms;
print "$d $t\n";
Output:
2010-03-29 19:46:26

localtime use in array context with POSIX strftime:

use POSIX qw(strftime);

$now_string = strftime "%a %b %e %H:%M:%S %Y", localtime;
print "$now_string\n";

Output (with cs_CZ.UTF-8 locale): 

Čt led 24 11:23:30 2008

Using the DateTime module:

use DateTime;
my $dt = DateTime->now;
say $dt->iso8601();
say $dt->year_with_christian_era();
say $dt->year_with_secular_era();
# etc.

Unix epoch:

print time;
Output:
1280473609

Phix

Library: Phix/basics
include timedate.e
?format_timedate(date(),"Dddd, Mmmm dth, YYYY, h:mm:ss pm")
 
atom t0 = time()
sleep(0.9)
?time()-t0
Output:
"Tuesday, July 12th, 2016, 11:30:07 am"
0.906

Note the system clock tick rate mean times can be out by ~0.0155s; it is not unusual to see total elapsed times of 0,0,0,0.016,0.016,0.016,0.031,0.031,0.031, etc.

Phixmonti 

def printList len for get print endfor enddef

time

"Actual time is " swap 1 get " hour, " rot 2 get " minutes, " rot 3 get nip " seconds, " 
"and elapsed " msec " seconds of running time." 10 tolist printList

PHP

Seconds since the Unix epoch:

echo time(), "\n";

Microseconds since the Unix epoch:

echo microtime(), "\n";

Formatted time:

echo date('D M j H:i:s Y'), "\n";  // custom format; see format characters here:
                                   // http://us3.php.net/manual/en/function.date.php
echo date('c'), "\n";  // ISO 8601 format
echo date('r'), "\n";  // RFC 2822 format
echo date(DATE_RSS), "\n";  // can also use one of the predefined formats here:
                            // http://us3.php.net/manual/en/class.datetime.php#datetime.constants.types

PicoLisp 

(stamp)
Output:
-> "2010-02-19 15:14:06

Pike 

write( ctime(time()) );
Output:
Thu Jan  2 23:58:19 2020

PL/I 

put (datetime()); /* writes out the date and time */
                  /* The time is given to thousandths of a second, */
                  /* in the format hhmiss999 */
put (time());     /* gives the time in the format hhmiss999. */

PowerShell

Using a cmdlet:

Get-Date

or using .NET classes and properties:

[DateTime]::Now


Prolog

GNU_Prolog

Works with: GNU Prolog
date_time(H).
Output:
H = dt(2022,1,23,21,37,16)

B-Prolog

Works with: B-Prolog
time(H,M,S)
Output:
H = 21
M = 37
S = 16
Works with: B-Prolog
date(Y,M,D)
Output:
Y = 2022
M = 1
D = 23


PureBasic 

time=Date()  ; Unix timestamp
time$=FormatDate("%mm.%dd.%yyyy %hh:%ii:%ss",time)

; following value is only reasonable accurate, on Windows it can differ by +/- 20 ms
ms_counter=ElapsedMilliseconds()
; could use API like QueryPerformanceCounter_() on Windows for more accurate values

Python 

import time
print time.ctime()

Q

Date & time are accessible via the virtual .z namespace. lowercase names are UTC, uppercase are local:

q).z.D
2010.01.25
q).z.N
0D14:17:45.519682000
q).z.P
2010.01.25D14:17:46.962375000
q).z.T
14:17:47.817
q).z.Z
2010.01.25T14:17:48.711
q).z.z
2010.01.25T19:17:59.445

Quackery 

time 1000000 / echo say " seconds since the Unix epoch."

Output 

1610201941 seconds since the Unix epoch.

R

Works with: R version 2.8.1

Note that this is output as a standard style string.

Sys.time()
Output:
[1] "2009-07-27 15:27:04 PDT"

Racket

The system time as a date string: 

#lang racket
(require racket/date)
(date->string (current-date))

Or, as seconds after midnight UTC, January 1, 1970:

#lang racket
(current-seconds)

Raku

(formerly Perl 6) 

say DateTime.now;
dd DateTime.now.Instant;
Output:
 2015-11-02T13:34:09+01:00
 Instant $var = Instant.new(<2159577143734/1493>)

Raven

Note the use of single quotation marks for the date specifier.

time dup print "\n" print int '%a %b %e %H:%M:%S %Y' date
Output:
1353352623.511231
Tue Nov 20 05:17:03 2012

REBOL 

now
print rejoin [now/year "-" now/month "-" now/day " " now/time]
Output:
10-Dec-2009/7:43:55-5:00
2009-12-10 7:43:55

Retro

Displays the number of seconds since the Unix epoch: 

time putn

REXX

Note that REXX only examines the first character of the option and can be in upper or lower case. 

/*REXX program shows various ways to display the system time, including other options.  */

say '════════════ Normal format of time'
say 'hh:mm:ss        ◄─────────────── hh= is  00 ──► 23'
say 'hh:mm:ss        ◄─────────────── hh= hour   mm= minute   ss= second'
say time()
say time('n')                                    /*    (same as the previous example.)  */
say time('N')                                    /*       "   "  "      "       "       */
say time('Normal')                               /*       "   "  "      "       "       */
say time('nitPick')                              /*       "   "  "      "       "       */

say
say '════════════ Civil format of time'
say 'hh:mmcc         ◄─────────────── hh= is   1 ──► 12'
say 'hh:mmam         ◄─────────────── hh= hour   mm= minute   am= ante meridiem'
say 'hh:mmpm         ◄───────────────                         pm= post meridiem'
say time('C')
say time('civil')                                /*    (same as the previous example.)  */
                                                 /*ante meridiem≡Latin for before midday*/
                                                 /*post    "       "    "   after   "   */
say
say '════════════ long format of time'
say 'hh:mm:ss        ◄─────────────── hh= is   0 ──► 23'
say 'hh:mm:ss.ffffff ◄─────────────── hh= hour   mm= minute   fffff= fractional seconds'
say time('L')
say time('long')                                 /*    (same as the previous example.)  */
say time('long time no see')                     /*       "   "  "      "       "       */

say
say '════════════ complete hours since midnight'
say 'hh              ◄─────────────── hh =  0 ───► 23'
say time('H')
say time('hours')                                /*    (same as the previous example.)  */

say
say '════════════ complete minutes since midnight'
say 'mmmm            ◄─────────────── mmmm =  0 ───► 1439'
say time('M')
say time('minutes')                              /*    (same as the previous example.)  */

say
say '════════════  complete seconds since midnight'
say 'sssss           ◄─────────────── sssss =  0 ───► 86399'
say time('S')
say time('seconds')                              /*    (same as the previous example.)  */
                                                 /*stick a fork in it,  we're all done. */
output:
════════════ Normal format of time
hh:mm:ss        ◄─────────────── hh= is  00 ──► 23
hh:mm:ss        ◄─────────────── hh= hour   mm= minute   ss= second
19:59:40
19:59:40
19:59:40
19:59:40
19:59:40

════════════ Civil format of time
hh:mmcc         ◄─────────────── hh= is   1 ──► 12
hh:mmam         ◄─────────────── hh= hour   mm= minute   am= ante meridiem
hh:mmpm         ◄───────────────                         pm= post meridiem
7:59pm
7:59pm

════════════ long format of time
hh:mm:ss        ◄─────────────── hh= is   0 ──► 23
hh:mm:ss.ffffff ◄─────────────── hh= hour   mm= minute   fffff= fractional seconds
19:59:40.250000
19:59:40.250000
19:59:40.250000

════════════ complete hours since midnight
hh              ◄─────────────── hh =  0 ───► 23
19
19

════════════ complete minutes since midnight
mmmm            ◄─────────────── mmmm =  0 ───► 1439
1199
1199

════════════  complete seconds since midnight
sssss           ◄─────────────── sssss =  0 ───► 86399
71980
71980

Ring 

/* Output:
** Sun                  abbreviated weekday name
** Sunday               full weekday name
** May                  abbreviated month name
** May                  full month name
** 05/24/15 09:58:38    Date & Time
** 24                   Day of the month
** 09                   Hour (24)
** 09                   Hour (12)
** 144                  Day of the year
** 05                   Month of the year
** 58                   Minutes after hour
** AM                   AM or PM
** 38                   Seconds after the hour
** 21                   Week of the year (sun-sat)
** 0                    day of the week
** 05/24/15             date
** 09:58:38             time
** 15                   year of the century
** 2015                 year
** Arab Standard Time   time zone
** %                    percent sign
*/

See TimeList()

RPL

Since 1990, there is a command named TICKS which returns the system time in 1/8192ths of a second, using a 64-bit unsigned integer:

Output:
1: #1DBC0D1698BE0h

There is also a TIME command, returning the system time in a hh.mmss format:

Output: 

1: 20.4526471679      @  8:45:26 PM

Ruby

version 1.9+

t = Time.now

# textual
puts t        # => 2013-12-27 18:00:23 +0900

# epoch time
puts t.to_i   # => 1388134823

# epoch time with fractional seconds
puts t.to_f   # => 1388134823.9801579

# epoch time as a rational (more precision):
puts Time.now.to_r  # 1424900671883862959/1000000000

Rust 

// 20210210 Rust programming solution

extern crate chrono;
use chrono::prelude::*;

fn main() {
   let utc: DateTime<Utc> = Utc::now();
   println!("{}", utc.format("%d/%m/%Y %T"));
}
Output:
10/02/2021 16:26:23

Scala

Library: Scala

Ad hoc solution as REPL scripts:

JDK < 8

println(new java.util.Date)
Output:
Sun Aug 14 22:47:42 EDT 2011

JDK >= 8 (recommended)

println(java.time.LocalTime.now())
Output:
11:32:39.002

Scheme

Works with: Chicken Scheme
(use posix)
(seconds->string (current-seconds))
Output:
"Sat May 16 21:42:47 2009"
Works with: Chez Scheme
(display (date-and-time)) (newline)
Output:
Mon Jun 27 19:51:09 2022

Seed7 

$ include "seed7_05.s7i";
  include "time.s7i";

const proc: main is func
  begin
    writeln(time(NOW));
  end func;
Output:
2009-12-07 17:09:44.687500 UTC+1

SETL 

$ Unix time
print(tod);

$ Human readable time and date
print(date);
Output:
1447628158908
Sun Nov 15 22:55:58 2015

Sidef 

# textual
say Time.local.ctime;        # => Thu Mar 19 15:10:41 2015

# epoch time
say Time.sec;                # => 1426770641

# epoch time with fractional seconds
say Time.micro_sec;          # => 1426770641.68409

Smalltalk

Works with: GNU Smalltalk
DateTime now displayNl.
Output:
2011-08-10T00:43:36-0-7:00
Works with: Pharo
Works with: Smalltalk/X
DateAndTime now
Output:
2011-08-16T19:40:37-03:00

SNOBOL4 

     OUTPUT = DATE()
END
Output:
03/30/2010 20:58:09

SPL 

hour,min,sec = #.now()
day,month,year = #.today()

#.output(#.str(hour,"00:"),#.str(min,"00:"),#.str(sec,"00.000"))
#.output(day,".",#.str(month,"00"),".",year)
Output:
03:15:34.068
24.08.2017

SQL PL

Works with: Db2 LUW
SELECT CURRENT DATE, CURRENT TIME, CURRENT TIMESTAMP FROM SYSIBM.SYSDUMMY1;

Output: 

db2 -t
db2 => SELECT CURRENT DATE, CURRENT TIME, CURRENT TIMESTAMP FROM SYSIBM.SYSDUMMY1;

1          2        3                         
---------- -------- --------------------------
04/29/2018 14:27:10 2018-04-29-14.27.10.674182

  1 record(s) selected.

Standard ML 

print (Date.toString (Date.fromTimeLocal (Time.now ())) ^ "\n")

Stata 

di c(current_date)
di c(current_time)

Swift 

import Foundation

var ⌚️ = NSDate()
println(⌚️)
Output:
2014-06-22 20:43:42 +0000

Tcl

This uses a timestamp that is a number of seconds since the start of the UNIX Epoch.

puts [clock seconds]

More readable forms may be created by formatting the time:

puts [clock format [clock seconds]]

TI-89 BASIC 

■ getTime()      {13  28  55}
■ getDate()       {2009  8  13}

Note that the system clock can be turned off, in which case the value returned will remain constant. isClkOn() can be used to check it.


True BASIC 

PRINT DATE$
! returns system date in format: “YYYYMMDD”.
! Here YYYY is the year, MM is the month number, and DD is the day number.

PRINT TIME$
! returns system time in format: “HH:MM:SS”.  
END


TUSCRIPT 

$$ MODE TUSCRIPT
time=time()
PRINT time
Output:
2011-04-05 13:45:44

UNIX Shell 

date       # Thu Dec  3 15:38:06 PST 2009

date +%s   # 1259883518, seconds since the epoch, like C stdlib time(0)

Ursa 

# outputs time in milliseconds
import "time"
out (time.getcurrent) endl console

Ursala

A library function, now, ignores its argument and returns the system time as a character string.

#import cli

#cast %s

main = now 0
Output:
'Fri, 26 Jun 2009 20:31:49 +0100'

This string can be converted to seconds since 1970 (ignoring leap seconds) by the library function string_to_time.

Vala 

var now = new DateTime.now_local();
string now_string = now.to_string();
Output:
2011-11-12T20:23:24-0800

VBA 

Debug.Print Now()
Output:
12/12/2013 16:16:16

VBScript 

WScript.Echo Now

V (Vlang) 

import time

fn main() {
    t := time.Now()
    println(t)                                    // default format YYYY-MM-DD HH:MM:SS
    println(t.custom_format("ddd MMM d HH:mm:ss YYYY")) // some custom format
}

Wren

Library: Wren-date

Although Wren CLI can tell how much time has elapsed since the script started, it currently has no way of knowing what the time was then or what the time is now (in the current locale) unless the user passes the former as a command line argument. 

import "os" for Process
import "./date" for Date

var args = Process.arguments
if (args.count != 1) Fiber.abort("Please pass the current time in hh:mm:ss format.")
var startTime = Date.parse(args[0], Date.isoTime)
for (i in 0..1e8) {} // do something which takes a bit of time
var now = startTime.addMillisecs((System.clock * 1000).round)
Date.default = Date.isoTime + "|.|ttt"
System.print("Time now is %(now)")
Output:

Sample session. 

$ wren systemTime.wren 19:00:00
Time now is 19:00:01.992

XPL0

The intrinsics GetReg and SoftInt are used to access DOS and BIOS routines. GetReg returns the address of an array where a copy of the processor's hardware registers are stored. Values (such as $2C00 in the example) can be stored into this array. When SoftInt is called, the values in the array are loaded into the processor's registers and the specified interrupt ($21 in the example) is called.

include c:\cxpl\codes;          \include intrinsic 'code' declarations

proc NumOut(N);                 \Output a 2-digit number, including leading zero
int  N;
[if N <= 9 then ChOut(0, ^0);
IntOut(0, N);
]; \NumOut

int Reg;
[Reg:= GetReg;                  \get address of array with copy of CPU registers
Reg(0):= $2C00;                 \call DOS function 2C (hex)
SoftInt($21);                   \DOS calls are interrupt 21 (hex)
NumOut(Reg(2) >> 8);            \the high byte of register CX contains the hours
ChOut(0, ^:);
NumOut(Reg(2) & $00FF);         \the low byte of CX contains the minutes
ChOut(0, ^:);
NumOut(Reg(3) >> 8);            \the high byte of DX contains the seconds
ChOut(0, ^.);
NumOut(Reg(3) & $00FF);         \the low byte of DX contains hundreths
CrLf(0);
]
Output:
13:08:26.60

Yabasic 

print time$

zkl 

Time.Clock.time //-->seconds since the epoch (C/OS defined)
Retrieved from "https://rosettacode.org/wiki/System_time?oldid=372674"
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