Time
Links
Countdown
http://www.spiders.com/countdown/
Calculate the exact time in days, hours, minutes and seconds from now until your birthday or any other event.
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.
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!
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.
Local Times Around the World
http://www.timeanddate.com/worldclock/
Find out what time it is anywhere in the world.