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See Also:

  • A Walk Through Time: An illustrated history of timekeeping from ancient times to the present.
  • Countdown: Calculate the exact time in days, hours, minutes and seconds from now until your birthday or any other event.
  • Daylight Saving Time: Why do we use daylight savings time and who invented it?
  • International Standard Date and Time Notation: International Standard ISO 8601 specifies numeric representations of date and time. It helps to avoid confusion caused by the many different national notations.
  • Latitude and Longitude: Introduction to latitude and longitude, a way of calculating exactly where you are anyplace on earth and a way to tell time.
  • Local Times Around the World: Find out what time it is anywhere in the world.
  • Make Your Own Star Clock: Learn how to tell time by finding constellations in the night sky.
  • Making a Horizontal Sundial: Learn how to make a sundial. Instructions are for beginners, intermediate, or advanced, and work for either the northern or southern hemispheres.
  • Making a Sun Clock: Before there were clocks, people used shadows to tell time. Learn how to make your own sun clock!
  • Time: Just how do we measure time and what has Greenwich England got to do with it?
  • Time Travel: Is time travel possible? See what Carl Sagan and Einstein had to say about time travel in this NOVA special.
  • What Time is it!: Gives the current time, synchronized by NIST. Close to 100 different time zones supported, as well as the ability to select the default time zone.
  • World Time Converter: Provides online times converter and brief information about GMT/UTC.


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