The time zone identifier is a key string that uniquely identifies a particular time zone. In Windows XP and Windows Vista, it corresponds to the subkeys of the HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Time Zone branch of the registry. It can be passed as a parameter to the FindSystemTimeZoneById method to retrieve a particular time zone from the registry.
Important Note: |
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If you are defining a custom time zone, you should not assign it an identifier longer than 32 characters because this is the maximum length supported by the Windows registry. |
The value of the Id property is usually, but not always, identical to that of the StandardName property. The identifier of the Coordinated Universal Time zone is UTC.