Data commit

Task/Palindrome-dates/C-sharp/palindrome-dates.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Linq;
+using System.Collections.Generic;
+
+public class Program
+{
+    static void Main()
+    {
+        foreach (var date in PalindromicDates(2021).Take(15)) WriteLine(date.ToString("yyyy-MM-dd"));
+    }
+
+    public static IEnumerable<DateTime> PalindromicDates(int startYear) {
+        for (int y = startYear; ; y++) {
+            int m = Reverse(y % 100);
+            int d = Reverse(y / 100);
+            if (IsValidDate(y, m, d, out var date)) yield return date;
+        }
+
+        int Reverse(int x) => x % 10 * 10 + x / 10;
+        bool IsValidDate(int y, int m, int d, out DateTime date) => DateTime.TryParse($"{y}-{m}-{d}", out date);
+    }
+}