How to add a new time zone to Windows Registry Hive?

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To add a new time zone to the Windows Registry Hive, follow these steps:

  1. Open the Registry Editor: You can do this by pressing the Windows key + R to open the Run dialog box, typing "regedit" and pressing Enter.

  2. Navigate to the time zone key: In the Registry Editor, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones.

  3. Create a new subkey: Right-click on the "Time Zones" key and select "New" > "Key". Give the new subkey a unique name that represents the time zone you want to add.

  4. Configure the time zone settings: Double-click on the new subkey and configure the following settings:

    • Display (REG_SZ): The name of the time zone as it will appear in the Windows Date and Time settings.

    • Dlt (REG_SZ): The name of the daylight saving time zone.

    • Std (REG_SZ): The name of the standard time zone.

    • MapID (REG_SZ): The time zone's mapping ID.

    • Index (REG_DWORD): The index of the time zone in the list of time zones.

    • TZI (REG_BINARY): The time zone's bias, standard bias, daylight bias, start and end dates, and transition rules.

    You can find the necessary values for these settings by examining the existing time zone subkeys in the registry.

  5. Save the changes: Once you have configured the settings for the new time zone subkey, click "OK" to save the changes.

Note that modifying the Windows Registry can be risky and should only be attempted by advanced users who understand the potential risks and consequences. Before making any changes to the Registry, it is recommended that you create a backup of your Registry settings to ensure that you can restore them if necessary.