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Time
Links to information about time, clocks and calendars.
Calendars - Reference
(Internet Public Library) Links to information on the organization and passing of time.
Clockworks: From Sundials to the Atomic Second
(Encyclopedia Britannica )
A look at three millennia of timekeeping.
Doomsday Algorithm
This site explains the formula for calculating the day of the week of a given date.
The History of Timekeeping
A history of timekeeping from using the sun to the development of atomic clocks.
The Horology Source
Horology is the science of measuring time and the art of making timepieces. This site offers links to information about timepieces of all kinds, repair and restoration, collecting, and more.
Local Times Around the World
This site attempts to list all of the countries of the world with their local times.
Official U.S. Time
(National Institute of Standards and Technology and the U.S. Naval Observatory )
These two agencies contribute to world time, or Coordinated Universal Time (UTC), for the U.S. The time is accurate within .1 second.
Perpetual Calendar
This site generates monthly calendars for any four-digit year (0001-9999). It takes into account the technicalities of leap years and the shortened month of October, 1582, when the Gregorian calendar replaced the Julian calendar.
A Rudimentary Treatise on Clocks, Watches and Bells
A digitized version of Baron Edmund Beckett Grimthorpe’s 1903 book on time measurement, chronometers, and bells.
A Walk through Time
(National Institute of Standards and Technology )
This NIST web site explores the evolution of time measurement.
World Time Server This handy site gives times for locations worldwide. Includes a searchable list of locations by country or city.
