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Last active August 7, 2024 18:31
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Adjusting Dates for Daylight Savings Time in C#
Raw
Program.cs
var easternTime = TimeZoneInfo.FindSystemTimeZoneById("America/New_York");
for (var month = 1; month <= 12; month++)
{
var date = new DateTime(2024, month, 1);
var utcOffset = easternTime.GetUtcOffset(date);
var timeZoneName = easternTime.IsDaylightSavingTime(date) ? easternTime.DaylightName : easternTime.StandardName;
Console.WriteLine($"On {date}, the UTC offset will be {utcOffset} ({timeZoneName}).");
}
// Output:
// On 1/1/2024 12:00:00 AM, the UTC offset will be -05:00:00 (Eastern Standard Time).
// On 2/1/2024 12:00:00 AM, the UTC offset will be -05:00:00 (Eastern Standard Time).
// On 3/1/2024 12:00:00 AM, the UTC offset will be -05:00:00 (Eastern Standard Time).
// On 4/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 5/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 6/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 7/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 8/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 9/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 10/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 11/1/2024 12:00:00 AM, the UTC offset will be -04:00:00 (Eastern Daylight Time).
// On 12/1/2024 12:00:00 AM, the UTC offset will be -05:00:00 (Eastern Standard Time).
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