- Daylight Saving Time - http://www.mrdowling.com/601-daylight.html
Why do we use daylight savings time and who invented it?
- International Standard Date and Time Notation - http://www.cl.cam.ac.uk/~mgk25/iso-time.html
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 - http://www-spof.gsfc.nasa.gov/stargaze/Slatlong.htm
Introduction to latitude and longitude, a way of calculating exactly where you are anyplace on earth and a way to tell time.
- Make Your Own Star Clock - http://www.lhs.berkeley.edu/StarClock/starclockprintout.html
Learn how to tell time by finding constellations in the night sky.
- Making a Sun Clock - http://www.exploratorium.edu/science_explorer/sunclock.html
Before there were clocks, people used shadows to tell time. Learn how to make your own sun clock!
- Making a Horizontal Sundial - http://www.lmsal.com/YPOP/Classroom/Lessons/Sundials/sundials.html
Learn how to make a sundial. Instructions are for beginners, intermediate, or advanced, and work for either the northern or southern hemispheres.
- Time - http://www.mrdowling.com/601-time.html
Just how do we measure time and what has Greenwich England got to do with it?
- Time Travel - http://www.pbs.org/wgbh/nova/time/
Is time travel possible? See what Carl Sagan and Einstein had to say about time travel in this NOVA special.
- A Walk Through Time - http://physics.nist.gov/GenInt/Time/time.html
An illustrated history of timekeeping from ancient times to the present.
- What Time is it! - http://www.whattimeisit.com/
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 - http://www.gkindia.com/bitsol_time/
Provides online times converter and brief information about GMT/UTC.
- NPR : 'Seize the Daylight': A History of Clock Chaos - http://www.npr.org/templates/story/story.php?storyId=4572036
Benjamin Franklin first called for the government to tinker with clock hours in the 1780s. But it wasn't until World War I that the United States adopted daylight-saving time as a way to get more efficiency out of the day. "Seize the Daylight" Author David Prerau talks about the complicated politics and curious history of DST, and he shares an excerpt from his book. [4:54 streaming audio broadcast]
- Countdown - http://www.spiders.com/portfolio/demos/countdown/
Calculate the exact time in days, hours, minutes and seconds from now until your birthday or any other event.
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