Horology - The Science of Time Keeping

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American Watchmakers-Clockmakers Institute (AWI)
Hosted by the American Watchmakers-Clockmakers Institute. AWI is a non-profit trade association dedicated to the advancement of horology. Horology is the study of the art and science of time... Browse through our pages to learn more about time, timekeeping, horology as a profession, and the organization that serves 6,000 members
from Alabama to Australia.

The Calendar Zone
Celestial Calendars, Cultural & Religious Calendars, Holidays, Millennium Info, Calendar Reform, Today Calendars, Web & Interactive Calendars, Y2K, also Calendar Information, Resources, Indexes & Directories, Calendar Software.

Calendars through the Ages
A site covering the history of the human endeavor to organize our lives in accordance with the sun and stars. Discover the origins of modern and past calendar systems. This site covers the calendars of several different
cultures and includes a timeline of calendar facts.

Clockworks: From Sundials to the Atomic Second
Clockworks is an animated historical exhibit of the many devices that have been created to measure time. Starting with the sundial and continuing to the modern-day quartz watch and cesium atomic clock, the exhibit chronicles man's endeavor to measure the passage of time. The exhibit features Quicktime movies and has a text-only version.

Date and Time Gateway
This page gives the exact Greenwich Mean Time, of the moment you access the page. It also allows you to
link to a specific city, listed by region, or to a specific time zone, designated by hours away from GMT.

The Directorate of Time
The Directorate of Time, located at the U.S. Naval Observatory in Washington, D.C. is the official source of time used in the U.S. From this page one can learn about the Master Clock, see a photograph of it, and learn about
how the time scale is calculated. Other links include the uses of time in communications and navigation.
You can also view a list of time zones worldwide.

Educational Exhibits about time, clocks, daylight saving and calendars
A walk through time. - History of timekeeping from ancient to modern times.
Calendars through the Ages.  - Systems of counting the days, months, and years.
Daylight Saving Time.   -When and why do we change our clocks?
ClockWorks.  - Illustrated mechanisms of many historical clocks.  Sundials to atomic clocks (Britannica)
Its About Time.  - Advances in timekeeping accuracy and atomic clocks.
The Quartz Watch.   - What's inside your wristwatch?


Horology - The Index
Horology is the science of time, timekeeping and timekeepers (incl. clocks and watches). This site... contains a hirarchical index to over 300 linked URLs related to horology. Includes lists of museums, schools, libraries, periodicals, brands, stores, manufacturers, as well as history, design, engineering and collecting of timepieces.

Manor House Museum
Founded upon collections assembled over more than a century, this museum of art and horology collects,
preserves and presents two quite different, but complementary, themes. One is of the changing artistic tastes and achievements of local people; the other is of the development of timekeeping in Britain, Europe and America. Together, these collections trace the creative genius of the artist, the inventor and the craft worker across the centuries. This site includes an introduction to horology, and information on an amazing variety of timekeeping technologies.

The Official U.S. Time
Click on any time zone on a map of the United States, and find out the official time for that zone, accurate
within .6 seconds. This site also includes links to other time-related Web sites and exhibits.

The 10,000 Year Calendar
A perpetual calendar; allows users to check days of the week for dates in history and in the future.
Browsable, not searchable, but easy enough to use.

Time and Date
A guide to timzones calendars and much more.

Time Zone Converter - The Time Zone - What time is it in ?
Now you can find out the time anywhere in the world with The Time Zone Converter.... The time zone rules on which the converter is based are updated whenever local laws or ordinances change to provide you with the most accurate time converter utility on the Net! Site also provides the ability to create a customized reference card that you can print and carry with you ... for your next vacation or business trip!

Timezone Converter
Specify the time zone, time and date to convert from, and the time zone to convert to.

United States Navel Observatory Master Clock Converter -USNO
What Time is it?
Universal time UTC at Greenwich, England (also called Zulu time), clocks for all time zones, animated clocks,
and a clock voice announcer!


Virtual Perpetual Calendars
A site that currently provides the calendar for any year in the 19th-21st centuries. You can also look up the dates for holidays in the United States and Canada from 1995-2010. Other features include a quick reference to signs
of the zodiac and seasons of the year along with their corresponding dates.

A Walk Through Time: Evolution of Time Measurement -A NIST Physics Laboratory presentation
History of ancient calendars, clocks, atomic clocks, and the time zones.

The World Clock
The current time at over 500 locations worldwide. It can be customized to show only the cities you want.

Pop-Up  Metric Conversions Calculator:

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Last Updated
Januuary 1, 2004
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Sheppard Wade and Associates