using System;

public class Program

{

    public static void Main()

    {

        var date = new DateTime(2017, 5, 10, 15, 00, 00, DateTimeKind.Utc);

        var tz = TimeZoneInfo.FindSystemTimeZoneById("US Eastern Standard Time");

        var tzDate = TimeZoneInfo.ConvertTimeFromUtc(date, tz);

        Console.WriteLine(date);

        Console.WriteLine(tzDate);

        Console.WriteLine(tz.BaseUtcOffset.Hours);

    }

}