C# TimeZoneInfo IsDaylightSavingTime(DateTimeOffset)

Description

TimeZoneInfo IsDaylightSavingTime(DateTimeOffset) indicates whether a specified date and time falls in the range of daylight saving time for the time zone of the current TimeZoneInfo object.

Syntax

TimeZoneInfo.IsDaylightSavingTime(DateTimeOffset) has the following syntax.


public bool IsDaylightSavingTime(
  DateTimeOffset dateTimeOffset
)

Parameters

TimeZoneInfo.IsDaylightSavingTime(DateTimeOffset) has the following parameters.

dateTimeOffset - A date and time value.

Returns

TimeZoneInfo.IsDaylightSavingTime(DateTimeOffset) method returns true if the dateTimeOffset parameter is a daylight saving time; otherwise, false.

Example


using System;//from www . ja  v a2s  .c  om
public class MainClass
{
    public static void Main(String[] argv)
    {
        DateTimeOffset unclearDate = DateTimeOffset.Now;

        Console.WriteLine("In the {0}, {1} is {2}ambiguous.",
                          TimeZoneInfo.Local.DisplayName,
                          unclearDate,
                          TimeZoneInfo.Local.IsAmbiguousTime(unclearDate) ? "" : "not ");
        // Test if time is DST.
        Console.WriteLine("In the {0}, {1} is {2}daylight saving time.",
                          TimeZoneInfo.Local.DisplayName,
                          unclearDate,
                          TimeZoneInfo.Local.IsDaylightSavingTime(unclearDate) ? "" : "not ");

        if (TimeZoneInfo.Local.IsAmbiguousTime(unclearDate) ||
            TimeZoneInfo.Local.IsDaylightSavingTime(unclearDate))
            Console.WriteLine("{0} may be daylight saving time in {1}.",
                              unclearDate, TimeZoneInfo.Local.DisplayName);

    }
}

The code above generates the following result.