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Microsoft Resource Kits - Windows 2000 Resource Kit

Tzedit.exe  (Windows 2000 Resource Kit)

The Windows 2000 Resource Kits help IT professionals deploy, manage, and support Windows 2000 operating systems.
There are a number of Windows 2000 Resource Kit software tools available for free download from Microsoft. These tools are listed below, and can help you streamline administrative tasks such as managing Active Directory™, administering security features, working with Group Policy and Terminal Services, automating application deployment, and other important jobs.

Tzedit.exe - Time Zone Editor
You can use Time Zone Editor to create and edit time zone entries for the Date/Time option in Control Panel. Time Zone Editor allows you to customize such information as time zone name, abbreviation, daylight savings time dates, and difference from Greenwich Mean Time. To edit or create time zone entries, you must be a member of the Administrators group.