Mayan calendar: Difference between revisions

=={{header|Go}}==

<lang go>package main

import (

"fmt"

"strconv"

"strings"

"time"

)

var sacred = strings.Fields("Imix’ Ik’ Ak’bal K’an Chikchan Kimi Manik’ Lamat Muluk Ok Chuwen Eb Ben Hix Men K’ib’ Kaban Etz’nab’ Kawak Ajaw")

var civil = strings.Fields("Pop Wo’ Sip Sotz’ Sek Xul Yaxk’in Mol Ch’en Yax Sak’ Keh Mak K’ank’in Muwan’ Pax K’ayab Kumk’u Wayeb’")

var (

date1 = time.Date(2012, time.December, 21, 0, 0, 0, 0, time.UTC)

date2 = time.Date(2019, time.April, 2, 0, 0, 0, 0, time.UTC)

)

func tzolkin(date time.Time) (int, string) {

diff := int(date.Sub(date1).Hours()) / 24

rem := diff % 13

if rem < 0 {

rem = 13 + rem

}

var num int

if rem <= 9 {

num = rem + 4

} else {

num = rem - 9

}

rem = diff % 20

if rem <= 0 {

rem = 20 + rem

}

return num, sacred[rem-1]

}

func haab(date time.Time) (string, string) {

diff := int(date.Sub(date2).Hours()) / 24

rem := diff % 365

if rem < 0 {

rem = 365 + rem

}

month := civil[(rem+1)/20]

last := 20

if month == "Wayeb’" {

last = 5

}

d := rem%20 + 1

if d < last {

return strconv.Itoa(d), month

}

return "Chum", month

}

func longCount(date time.Time) string {

diff := int(date.Sub(date1).Hours()) / 24

diff += 13 * 400 * 360

baktun := diff / (400 * 360)

diff -= baktun * 400 * 360

katun := diff / (20 * 360)

diff -= katun * 20 * 360

tun := diff / 360

diff -= tun * 360

winal := diff / 20

kin := diff - winal*20

return fmt.Sprintf("%d.%d.%d.%d.%d", baktun, katun, tun, winal, kin)

}

func lord(date time.Time) string {

diff := int(date.Sub(date1).Hours()) / 24

rem := diff % 9

if rem <= 0 {

rem = 9 + rem

}

return fmt.Sprintf("G%d", rem)

}

func main() {

const shortForm = "2006-01-02"

dates := []string{

"2004-06-19",

"2012-12-18",

"2012-12-21",

"2019-01-19",

"2019-03-27",

"2020-02-29",

"2020-03-01",

}

fmt.Println(" Gregorian Tzolk’in Haab’ Long Lord of")

fmt.Println(" Date # Name Day Month Count the Night")

fmt.Println("---------- -------- ------------- -------------- ---------")

for _, dt := range dates {

date, _ := time.Parse(shortForm, dt)

n, s := tzolkin(date)

d, m := haab(date)

lc := longCount(date)

l := lord(date)

fmt.Printf("%s %2d %-8s %4s %-9s %-14s %s\n", dt, n, s, d, m, lc, l)

}

}</lang>

{{out}}

<pre>

Gregorian Tzolk’in Haab’ Long Lord of

Date # Name Day Month Count the Night

---------- -------- ------------- -------------- ---------

2004-06-19 4 Ben 16 Sotz’ 12.19.11.6.13 G7

2012-12-18 1 Kaban Chum K’ank’in 12.19.19.17.17 G6

2012-12-21 4 Ajaw 3 K’ank’in 13.0.0.0.0 G9

2019-01-19 1 Ajaw 13 Muwan’ 13.0.6.3.0 G6

2019-03-27 3 Manik’ Chum Wayeb’ 13.0.6.6.7 G1

2020-02-29 4 Kimi 14 K’ayab 13.0.7.5.6 G7

2020-03-01 5 Manik’ 15 K’ayab 13.0.7.5.7 G8

</pre>