using System;

using System.Collections.Generic;

using System.Collections.ObjectModel;

public class Program

{

    public static void Main()

    {

        ReadOnlyCollection<TimeZoneInfo> tz;

        List<TimeZoneInfo> midnightTimeZone = new List<TimeZoneInfo>();

        tz= TimeZoneInfo.GetSystemTimeZones();

        foreach(var t in tz) {

            var dateInTimeZone = TimeZoneInfo.ConvertTime(DateTime.Now, t);

            Console.Write(dateInTimeZone.Hour);

            Console.WriteLine(t.DisplayName);

            if (dateInTimeZone.Hour == 0) {

                midnightTimeZone.Add(t);

            }

        }

        Console.WriteLine("");

        Console.WriteLine("");

        Console.WriteLine("TimeZone where it is Midnight");

        foreach(var t in midnightTimeZone) {

            Console.WriteLine(t.DisplayName);

        }

    }

}