Astronomy and Calendars

1. NASA — Information on astronomical phenomena and space operations.
2. U.S. Naval Observatory — Provide Universal Coordinated Time service.
3. Time Synchronication Applications — Software to set and synchronize system time to Universal Coordinated Time.
4. National Space Society — Seek human colonization of space.
5. One-World Global Calendar — Information on all kinds of holidays and anniversaries celebrated by countries all over the world.
6. Festivals and Holidays — Another reference for holidays and festivals of all kinds.
7. World Wide Holiday and Festival Page — Another reference for holidays and festivals of all kinds.

What you can do to help