Traditional horology website with information and mantainance tips. Technical descriptions and troubleshooting of escapements. Grandfather clocks, wall clocks, and watches.

Core algorithm of international time scale has multiple metrology applications, from atomic clock frequency characterization to definition of the meter. Equation, explanation and publications.

The Horological Foundation's directory of web sites for watches, clocks, instruments and barometers.

Horological index for organizations, clock and watch museums, related software, mailing lists and links. Maintained by Gordon T. Uber.

Company specialized in all aspects of work connected with church clocks, public clocks, and tower clocks which includes the full historical restoration of antique clock movements.

Articles and pictures of the first two watches made by David Knight. Rich artistic pictures.

History of daylight saving time and how we use it to save energy.

Explanation of the roles of components of a wristwatch.

Gateway to all aspects of clocks, watches, timekeeping, and the science of horology.

Horology is the science of time, timekeeping and timekeepers. Organized collection of links to horological websites globally.

The 24 hour analog clock and watch site. History, software, and the places to find clocks with 24 h dials.

Complete five-part explanation of time and how it is measured, including information about clocks, time zones, calendars, BC and AD.

A short history of the week and each day of the week.

Description of the restoration of Jens Olsen's Astronomical Clock, a masterpiece in Copenhagen City Hall that consists of 15.448 individual parts.

A response to a VMS problem report giving a detailed explanation of why 2000 is a leap year.