using System;

public class Program {

    public static void Main()

    {

        DateTime test1 = new DateTime(2023,03,12,1,59,0); // 03/12/2023 1:59AM

        DateTime test2 = new DateTime(2023,03,12,2,59,0); // 03/12/2023 2:59AM

        TestTimeZone(test1);

        TestTimeZone(test2);

    }

    public static void TestTimeZone(DateTime dateTest)

    {

        TimeZoneInfo _cst = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");

        TimeZoneInfo _est = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");

        Console.WriteLine(String.Format("Date test: {0}", dateTest));

        DateTime dateTestUTC = TimeZoneInfo.ConvertTimeToUtc(dateTest, _est);

        Console.WriteLine(String.Format("UTC: {0}", dateTestUTC));

​

        DateTime dateTestCST = TimeZoneInfo.ConvertTimeFromUtc(dateTestUTC, _cst);

        Console.WriteLine(String.Format("CST: {0}", dateTestCST));

    }

}