SupportsDaylightSavingTime Property
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TimeZoneInfo.SupportsDaylightSavingTime Property

Gets a value indicating whether the time zone has any daylight saving time rules.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public bool SupportsDaylightSavingTime { get; }

Property Value

Type: System.Boolean
true if the time zone supports daylight saving time; otherwise, false.

The value of the SupportsDaylightSavingTime property for the local time zone returned by the TimeZoneInfo.Local property reflects the setting of the Control Panel Date and Time application's checkbox that defines whether the system automatically adjusts for daylight saving time. If it is unchecked, or if no checkbox is displayed for a time zone, the value of this property is false.

The following example retrieves a collection of all time zones that are available on a local system and displays the names of those that do not support daylight saving time.


ReadOnlyCollection<TimeZoneInfo> zones = TimeZoneInfo.GetSystemTimeZones();
foreach(TimeZoneInfo zone in zones)
{
   if (! zone.SupportsDaylightSavingTime)
      Console.WriteLine(zone.DisplayName);
}


.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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