Determine Calgary market open hours in different timezones

CalgaryTimeZones.cs

Console.WriteLine("NOW: " + DateTime.UtcNow);

var timesOfYear = new List<Tuple<string, DateTime>>
{
	Tuple.Create("Today (now)", DateTime.UtcNow),
	Tuple.Create("Calgary Summer", new DateTime(2018, 6, 27, 14, 30, 0).ToUniversalTime()),
	Tuple.Create("Calgary Winter", new DateTime(2018, 11, 21, 14, 00, 0).ToUniversalTime()),
	Tuple.Create("In between DST", new DateTime(2018, 3, 19, 14, 30, 0).ToUniversalTime())
};

foreach (var timeOfYear in timesOfYear)
{
	Console.WriteLine($"\r\n==={timeOfYear.Item1} (UTC: {timeOfYear.Item2})===");
	DateTime calgaryTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(timeOfYear.Item2, "Mountain Standard Time");
	DateTime londonTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(timeOfYear.Item2, "GMT Standard Time");
	DateTime dubaiTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(timeOfYear.Item2, "Arab Standard Time");
	DateTime sydneyTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(timeOfYear.Item2, "AUS Eastern Standard Time");

	Console.WriteLine($"CALGARY TIME: {calgaryTime}");
	Console.WriteLine($"LONDON TIME: {londonTime}");
	Console.WriteLine($"DUBAI TIME: {dubaiTime}");
	Console.WriteLine($"SYDNEY TIME: {sydneyTime}");
}