DateAndTimeMeltingPot.cs

using System;
using System.Globalization;

namespace DateAndTimeMeltingPot {
	class MainClass {
		public static void Main(string[] args) {
			// Getting 'calendar/clock' date adn time
			DateTime myBirthday = new DateTime(1978, 3, 19, 1, 15, 0, DateTimeKind.Unspecified);
			Print(myBirthday);

			// Getting 'now' as 'millis since epoch'
			DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
			long now = Convert.ToInt64((DateTime.UtcNow - epoch).TotalMilliseconds);

			// Getting 'now' as DateTime instance on system time zone
			DateTime nowAsDateAndTime = DateTime.Now;
			Print(nowAsDateAndTime);

			// Converting DateTime from one time zone to another one
			DateTime nowAsUtcDateTime = TimeZoneInfo.ConvertTimeToUtc(nowAsDateAndTime);
			Print(nowAsUtcDateTime);
			DateTime nowInNewZealand = TimeZoneInfo.ConvertTimeFromUtc(nowAsUtcDateTime, TimeZoneInfo.FindSystemTimeZoneById("New Zealand Standard Time"));

			Print(nowInNewZealand);

			// Parsing from ISO
			DateTime parsedLocal = DateTime.Parse("1978-03-19T01:15:00.000Z", CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal);
			Print(parsedLocal);

			DateTime parsedUtc= DateTime.Parse("1978-03-19T01:15:00.000Z", CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal);
			Print(parsedUtc);

			Console.ReadKey();
		}

		private static void Print(DateTime dt) { 
			Console.WriteLine($"{dt} {dt.Kind}");
		}
	}
}