using System;

public class Program

{

    public static void Main()

    {

        //Sample date time

        DateTime thisDateTime = Convert.ToDateTime("2019-04-01 4:40:00 PM");

        //Get current time zone

        var curTz = TimeZone.CurrentTimeZone;

        Console.WriteLine(curTz.StandardName);

        //Get time zone information for given time zone

        //TimeZoneInfo thisTz = TimeZoneInfo.FindSystemTimeZoneById(curTz.StandardName);

        TimeZoneInfo thisTz = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");

        //Check if the region / timezone supports day light savings

        bool isSupportDayLight = thisTz.SupportsDaylightSavingTime;

        //Check if the given date falls under day light time period

        bool isDayLightPeriod = thisTz.IsDaylightSavingTime(thisDateTime);

        Console.WriteLine("Is that region supports Day Light Savings");

        Console.WriteLine(isSupportDayLight);

        Console.WriteLine("Given date " + thisDateTime + " come under Day Light Saving Time");

        Console.WriteLine(isDayLightPeriod);

        Console.WriteLine(TimeZoneInfo.Local);

    }

}