NoteHKCU\Software\Policies\Microsoft\Control Panel\International\Calendars\
The TwoDigitYearMax subkey in the Policies subkey contains entries that store Group Policy settings for calendar options in Regional Options in Control Panel. The entries in this subkey are created and maintained by Group Policy and read and interpreted by Regional Options.
This subkey can contain an entry representing each of the different calendars available on Windows 2000. Each entry represents a type of calendar and is named by the calendar-ID of that type of calendar .
The System.adm file included in Windows 2000, adds an entry named 1 (see the <Calendar-ID> entry) to the TwoDigitYearMax subkey when you enable the Century interpretation for Year 2000 Group Policy. However, you can edit the System.adm file or create a custom .adm file to add an entry for any Windows 2000 calendar type. TwoDigitYearMax is relevant to all calendar types except for the Era: Year of the Emperor (Japan) calendar (Type 3) and the Era: Year of Taiwan calendar (Type 4).
Note
Regional Options in Control Panel coordinates all Gregorian calendars, such that changes to any type of Gregorian calendar are applied to all other types of Gregorian calendars. However, Group Policy changes the value only of the localized Gregorian calendar. To maintain coordinated Gregorian calendars, you must edit System.adm or create a customize .adm file.
Tip
For detailed information about particular Group Policy settings, see the Group Policy Reference (Gp.chm) on the Windows 2000 Resource Kit companion CD.
For general information about Group Policy, see Group Policy in Windows 2000 Help.
To see a table associating policies with their corresponding registry entries, see the Group Policy Reference Table.