Initial data commit

Task/Discordian-date/C-sharp/discordian-date.cs

@@ -0,0 +1,55 @@
+using System;
+
+public static class DiscordianDate
+{
+    static readonly string[] seasons = { "Chaos", "Discord", "Confusion", "Bureaucracy", "The Aftermath" };
+    static readonly string[] weekdays = { "Sweetmorn", "Boomtime", "Pungenday", "Prickle-Prickle", "Setting Orange" };
+    static readonly string[] apostles = { "Mungday", "Mojoday", "Syaday", "Zaraday", "Maladay" };
+    static readonly string[] holidays = { "Chaoflux", "Discoflux", "Confuflux", "Bureflux", "Afflux" };
+
+    public static string Discordian(this DateTime date) {
+        string yold = $" in the YOLD {date.Year + 1166}.";
+        int dayOfYear = date.DayOfYear;
+
+        if (DateTime.IsLeapYear(date.Year)) {
+            if (dayOfYear == 60) return "St. Tib's day" + yold;
+            else if (dayOfYear > 60) dayOfYear--;
+        }
+        dayOfYear--;
+
+        int seasonDay = dayOfYear % 73 + 1;
+        int seasonNr = dayOfYear / 73;
+        int weekdayNr = dayOfYear % 5;
+        string holyday = "";
+
+        if (seasonDay == 5)       holyday = $" Celebrate {apostles[seasonNr]}!";
+        else if (seasonDay == 50) holyday = $" Celebrate {holidays[seasonNr]}!";
+        return $"{weekdays[weekdayNr]}, day {seasonDay} of {seasons[seasonNr]}{yold}{holyday}";
+    }
+
+    public static void Main() {
+        foreach (var (day, month, year) in new [] {
+            (1, 1, 2010),
+            (5, 1, 2010),
+            (19, 2, 2011),
+            (28, 2, 2012),
+            (29, 2, 2012),
+            (1, 3, 2012),
+            (19, 3, 2013),
+            (3, 5, 2014),
+            (31, 5, 2015),
+            (22, 6, 2016),
+            (15, 7, 2016),
+            (12, 8, 2017),
+            (19, 9, 2018),
+            (26, 9, 2018),
+            (24, 10, 2019),
+            (8, 12, 2020),
+            (31, 12, 2020)
+        })
+        {
+            Console.WriteLine($"{day:00}-{month:00}-{year:00} = {new DateTime(year, month, day).Discordian()}");
+        }
+    }
+
+}