Discordian date: Difference between revisions

=={{header|D}}==

<lang d>import std.stdio, std.datetime, std.conv, std.string;

immutable seasons = ["Chaos", "Discord", "Confusion", "Bureaucracy", "The Aftermath"];

immutable weekday = ["Sweetmorn", "Boomtime", "Pungenday", "Prickle-Prickle", "Setting Orange"];

immutable apostle = ["Mungday", "Mojoday", "Syaday", "Zaraday", "Maladay"];

immutable holiday = ["Chaoflux", "Discoflux", "Confuflux", "Bureflux", "Afflux"];

string discordianDate(Date date) {

auto dyear = to!string(date.year + 1166);

auto isLeapYear = date.isLeapYear;

if (isLeapYear && date.month == 2 && date.day == 29)

return "St. Tib's Day, in the YOLD " ~ dyear;

auto dday = date.dayOfYear - 1;

if (isLeapYear && dday >= 60)

dday--;

auto indx = dday / 73;

auto seas = seasons[indx];

auto wday = weekday[dday % 5];

auto sday = dday % 73 + 1; // season day

if (sday == 5) return apostle[indx] ~ ", in the YOLD " ~ dyear;

if (sday == 50) return holiday[indx] ~ ", in the YOLD " ~ dyear;

return format("%s, day %s of %s in the YOLD %s", wday, sday, seas, dyear);

}

void main() {

auto today = cast(Date)Clock.currTime();

auto ddate = discordianDate(today);

writeln(ddate);

}

</lang>

<lang d>unittest {

assert(discordianDate(Date(2010,7,22)) == "Pungenday, day 57 of Confusion in the YOLD 3176");

assert(discordianDate(Date(2012,2,28)) == "Prickle-Prickle, day 59 of Chaos in the YOLD 3178");

assert(discordianDate(Date(2012,2,29)) == "St. Tib's Day, in the YOLD 3178");

assert(discordianDate(Date(2012,3, 1)) == "Setting Orange, day 60 of Chaos in the YOLD 3178");

assert(discordianDate(Date(2010,1, 5)) == "Mungday, in the YOLD 3176");

assert(discordianDate(Date(2011,5, 3)) == "Discoflux, in the YOLD 3177");

}</lang>