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Task/Discordian-date/Sidef/discordian-date.sidef

@@ -0,0 +1,31 @@
+require('Time::Piece');
+
+var seasons = %w(Chaos Discord Confusion Bureaucracy The\ Aftermath);
+var week_days = %w(Sweetmorn Boomtime Pungenday Prickle-Prickle Setting\ Orange);
+
+func ordinal (n) {
+    "#{n}" + (n % 100 ~~ [11,12,13] ? 'th'
+                                    : <th st nd rd th th th th th th>[n % 10])
+}
+
+func ddate(ymd) {
+    var d = %s'Time::Piece'.strptime(ymd, '%Y-%m-%d');
+    var yold = "in the YOLD #{d.year + 1166}";
+
+    var day_of_year0 = d.day_of_year;
+
+    if (d.is_leap_year) {
+        return "St. Tib's Day, #{yold}" if ([d.mon, d.mday] == [2, 29]);
+        day_of_year0-- if (day_of_year0 >= 60); # Compensate for St. Tib's Day
+    }
+
+    var weekday = week_days[day_of_year0 % week_days.len];
+    var season = seasons[day_of_year0 / 73];
+    var season_day = ordinal(day_of_year0 % 73 + 1);
+
+    return "#{weekday}, the #{season_day} day of #{season} #{yold}";
+}
+
+%w(2010-07-22 2012-02-28 2012-02-29 2012-03-01).each { |ymd|
+    say "#{ymd} is #{ddate(ymd)}"
+}