System.TimeZone public abstract class TimeZone Documentation public static TimeZone CurrentTimeZone { get; } public abstract string DaylightName { get; } public abstract string StandardName { get; } protected TimeZone() public static bool IsDaylightSavingTime(DateTime time, DaylightTime daylightTimes) public abstract DaylightTime GetDaylightChanges(int year) public abstract TimeSpan GetUtcOffset(DateTime time) public virtual bool IsDaylightSavingTime(DateTime time) public virtual DateTime ToLocalTime(DateTime time) public virtual DateTime ToUniversalTime(DateTime time)