C# Dates and Times

using System;

class Program
{
    static void Main()
    {
        DateTime d = new DateTime(2026, 11, 4, 14, 30, 0);
        Console.WriteLine(d.Year + "-" + d.Month + "-" + d.Day);
        Console.WriteLine(d.DayOfWeek);
        Console.WriteLine(d.AddDays(30).ToString("yyyy-MM-dd"));
        Console.WriteLine(d.ToString("HH:mm"));

        DateTime a = new DateTime(2026, 1, 1);
        DateTime b = new DateTime(2026, 12, 25);
        TimeSpan diff = b - a;
        Console.WriteLine(diff.Days);

        Console.WriteLine(DateTime.DaysInMonth(2028, 2));
        Console.WriteLine(DateTime.IsLeapYear(2026));
    }
}

2026-11-4
Wednesday
2026-12-04
14:30
358
29
False