Time Zone and Daylight Saving Time Data

A directory of sites providing descriptions of civil timekeeping concepts, source code, databases, and maps.
http://www.twinsun.com/tz/tz-link.htm

Atomic Clock Time

Displayed in a variety of useful formats. Site is a front-end to U.S. government atomic clocks.
http://www.atomictime.net/

This Day In History

Today in history every day - often with pictures and sound.
http://www.HistoryChannel.com/today/

Calendar Zone

A categorized collection of calendar related sites.
http://www.calendarzone.com/

International Standard Date and Time Notation

An overview of the ISO 8601 notation for dates.
http://www.cl.cam.ac.uk/~mgk25/iso-time.html

The Calendar

Summarizes the history of various calendars developed and used over the centuries.
http://www.skeptics.com.au/journal/calendar.htm

NIST Time and Frequency Division

The National Institute of Standards and Technology maintains time and frequency standards for the United States.
http://www.boulder.nist.gov/timefreq/

Time FAQ

Frequently Asked Questions about time (from sci.astro news group)
http://www.faqs.org/faqs/astronomy/faq/part3/

A Walk Through Time

Evolution of timekeeping through the centuries.
http://physics.nist.gov/GenInt/Time/time.html

Today's Calendar and Clock Page

Information on all things relating to calendars, dates, holidays, and time. Find today's date on several different cultural and religious calendars. Includes section on Celestial data, countdown clocks, and information on the dates past events.
http://www.ecben.net/calendar.shtml

United States Code

Weights, measures and standard time.
http://tycho.usno.navy.mil/260.html

Time

Provides descriptions of several standards of time.
http://scienceworld.wolfram.com/astronomy/Time.html

U.S. Time Zones

History of standard time in the U.S.
http://aa.usno.navy.mil/faq/docs/us_tzones.html

English Calendar

Includes an ecclesiastical calendar and a section on old and new style dating.
http://www.albion.edu/english/calendar/

Calendar Studies

Information about calendar history and calendar reform.
http://www.hermetic.ch/cal_stud.htm

Time References

To set your watch or clock accurately using a time reference. Explains the various options for residents of North America.
http://htexplained.com/watches/TimeRef/

Date Algorithms

Provides descriptions, proofs and computer programming implementation examples to convert dates to various calendar dates for Julian, Gregorian, and Rata Die calendars.
http://vsg.cape.com/~pbaum/date/date0.htm

A Few Facts Concerning GMT, UT, and the RGO

Explains the differences between several time systems.
http://www.apparent-wind.com/gmt-explained.html

Infoplease: Daylight Saving Time

Information and history about Daylight Saving Time all over the world.
http://www.infoplease.com/spot/daylight1.html

Light of Day

Shedding light on Queensland's daylight saving opposition.
http://www.lightofday.primetap.com

NPR : 'Seize the Daylight': A History of Clock Chaos

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 Da
http://www.npr.org/templates/story/story.php?storyId=4572036

Calendar: A History

The history of the western calendar and the clock.
http://users.commspeed.net/k6xf/calendar.htm