Unfortunately no U.S. Web page can provide official information on world time
zones because nations are sovereign powers that can and do change their
timekeeping systems as they see fit. The information here is provided for
general interest purposes only.
Click here for a map of world time zones (192K)
U.S. law on standard time zones
Time Zones Explanation by F.Pollastri
Time Service Dept., U.S. Naval Observatory, Washington, DC