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.
Making a Sun Clock Before there were clocks, people used shadows to tell time. Learn how to make your own sun clock!
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.
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.
A Walk Through Time An illustrated history of timekeeping from ancient times to the present.
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.
Discover - Time Machine Article explores a clock designed to keep accurate time for 10,000 years.
How Stuff Works: Time Complete five-part explanation of time and how it is measured, including information about clocks, time zones, and calendars.
The Hourglass The University of Houston College of engineering, describes how an hourglass works and also provides interesting facts about this timekeeper.
Industrious Clock Clock using video of a hand drawing to display the time.
