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See also:

• Kids and Teens: School Time: Science: Astronomy and Space: Time  (25)
• Science: Astronomy: Amateur: Sky Calendars  (15)
• Science: Astronomy: Calendars and Timekeeping  (55)
• Science: Earth Sciences: Geology: Geochronology  (14)
• Science: Physics: Relativity: Time Travel  (16)
• Society: History: Timelines  (64)
• Society: Philosophy: Philosophy of Science: Physics: Time and Timelessness  (14)

This category in other languages:
	Chinese Simplified  (2)   Chinese  (1)   Danish  (14)   French  (36)   German  (18)   Korean  (1)

• A Brief History of Time NameSpy.CN NameSpy.CN - Early origins and historical perspectives of time measurement.
• The Calendar NameSpy.CN - Summarizes the history of various calendars developed and used over the centuries.
• Calendar Studies NameSpy.CN - Information about calendar history and calendar reform.
• Calendar Zone NameSpy.CN - A categorized collection of calendar related sites.
• English Calendar NameSpy.CN - Includes an ecclesiastical calendar and a section on old and new style dating.
• A Few Facts Concerning GMT, UT, and the RGO NameSpy.CN - Explains the differences between several time systems.
• A History of Time NameSpy.CN NameSpy.CN - Explains the importance of concept of time in the history of mathematics, science and measurement.
• Infoplease: Daylight Saving Time NameSpy.CN NameSpy.CN - Information and history about Daylight Saving Time all over the world.
• International Standard Date and Time Notation NameSpy.CN - An overview of the ISO 8601 notation for dates.
• Internet Encyclopedia of Philosophy: Time NameSpy.CN NameSpy.CN - Time has been studied for thousands of years. Nevertheless, many issues remain to be resolved. This article explores both what is now known about time and what is controversial and unresolved.
• NIST Time and Frequency Division NameSpy.CN - The National Institute of Standards and Technology maintains time and frequency standards for the United States.
• NPR : 'Seize the Daylight': A History of Clock Chaos NameSpy.CN - 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 David Prerau talks about the complicated politics and curious history of DST, and he shares an excerpt from his book. [4:54 streaming audio broadcast]
• This Day In History NameSpy.CN - Today in history every day - often with pictures and sound.
• Time NameSpy.CN - Provides descriptions of several standards of time.
• Time FAQ NameSpy.CN - Frequently Asked Questions about time (from sci.astro news group)
• Time Zone and Daylight Saving Time Data NameSpy.CN - A directory of sites providing descriptions of civil timekeeping concepts, source code, databases, and maps.
• Today's Calendar and Clock Page NameSpy.CN - 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.
• United States Code NameSpy.CN - Weights, measures and standard time.
• U.S. Time Zones NameSpy.CN - History of standard time in the U.S.
• A Walk Through Time NameSpy.CN NameSpy.CN - Evolution of timekeeping through the centuries.
• Wikipedia: Time NameSpy.CN NameSpy.CN - Time is a common term for the experience of duration, and a fundamental quantity of measuring systems. Article explains time definitions, history of measurements, perceptions in religion, philosophy and science.
• Z-Time NameSpy.CN NameSpy.CN - Article on the time at 0 degrees longitude. Covers the timezone origin, GMT, UTC, GCT, ZULU and JIG.

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