DaylightName Property

TimeZoneInfo.DaylightName Property


Gets the display name for the current time zone's daylight saving time.

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

Public ReadOnly Property DaylightName As String

Property Value

Type: System.String

The display name for the time zone's daylight saving time.

The display name is localized based on the culture installed with the Windows operating system.

A DaylightName property whose value is not String.Empty or null does not necessarily indicate that the time zone supports daylight saving time. To determine whether the time zone supports daylight saving time, check the value of its SupportsDaylightSavingTime property.

In most cases, the DaylightName property of time zones defined in the registry is not String.Empty or null. However, the DaylightName property of custom time zones can be set to String.Empty. This occurs when custom time zones are created by the TimeZoneInfo.CreateCustomTimeZone(String, TimeSpan, String, String) or the TimeZoneInfo.CreateCustomTimeZone(String, TimeSpan, String, String, String, TimeZoneInfo.AdjustmentRule(), Boolean) overload and the disableDaylightSavingTime parameter is true. Therefore, your code should never assume that the value of the DaylightName property is not null or empty.

The DaylightName property is equivalent to the DaylightName property of the TimeZone class.

The following example defines a method named DisplayDateWithTimeZoneName that uses the IsDaylightSavingTime(DateTime) method to determine whether to display a time zone's standard time name or daylight saving time name.

Private Sub DisplayDateWithTimeZoneName(date1 As Date, timeZone As TimeZoneInfo)
   Console.WriteLine("The time is {0:t} on {0:d} {1}", _
                     date1, _
                     IIf(timeZone.IsDaylightSavingTime(date1), _
                         timezone.DaylightName, timezone.StandardName))   
End Sub
' The example displays output similar to the following:
'    The time is 1:00 AM on 4/2/2006 Pacific Standard Time   

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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