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Alternative Systems (7) Clocks and Watches (12)

Current Time (29) Horology (26)

ISO 8601 (48) Network Time Protocol (16)

Web Pages

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	International Standard Date and Time Notation - http://www.cl.cam.ac.uk/~mgk25/iso-time.html An overview of the ISO 8601 notation for dates.
	U.S. Time Zones - http://aa.usno.navy.mil/faq/docs/us_tzones History of standard time in the U.S.
	NIST Time and Frequency Division - http://tf.nist.gov/ The National Institute of Standards and Technology maintains time and frequency standards for the United States.
	A Walk Through Time - http://physics.nist.gov/GenInt/Time/time.html Evolution of timekeeping through the centuries.
	Time Zone and Daylight Saving Time Data - http://www.twinsun.com/tz/tz-link.htm A directory of sites providing descriptions of civil timekeeping concepts, source code, databases, and maps.

	Calendar Zone - http://www.calendarzone.com/ A categorized collection of calendar related sites.
	This Day In History - http://www.history.com/this-day-in-history.do Today in history every day - often with pictures and sound.
	Wikipedia: Time - http://en.wikipedia.org/wiki/Time 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.
	United States Code - http://tycho.usno.navy.mil/260.html Weights, measures and standard time.
	A Few Facts Concerning GMT, UT, and the RGO - http://www.apparent-wind.com/gmt-explained.html Explains the differences between several time systems.

	http://scienceworld.wolfram.com/astronomy/Time.html - http://scienceworld.wolfram.com/astronomy/Time.html Provides descriptions of several standards of time.
	Internet Encyclopedia of Philosophy: Time - http://www.iep.utm.edu/t/time.htm 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.
	Calendar Studies - http://www.hermetic.ch/cal_stud.htm Information about calendar history and calendar reform.
	English Calendar - http://www.albion.edu/english/calendar/ Includes an ecclesiastical calendar and a section on old and new style dating.
	Infoplease: Daylight Saving Time - http://www.infoplease.com/spot/daylight1.html Information and history about Daylight Saving Time all over the world.

	http://www.maybeck.com/ztime/ - http://www.maybeck.com/ztime/ Article on the time at 0 degrees longitude. Covers the timezone origin, GMT, UTC, GCT, ZULU and JIG.
	A Brief History of Time - http://www.perseus.tufts.edu/GreekScience/Students/Chris/TIME2.html Early origins and historical perspectives of time measurement.
	NPR : 'Seize the Daylight': A History of Clock Chaos - http://www.npr.org/templates/story/story.php?storyId=4572036 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]
	Time FAQ - http://www.faqs.org/faqs/astronomy/faq/part3/ Frequently Asked Questions about time (from sci.astro news group)
	A History of Time - http://www-history.mcs.st-andrews.ac.uk/HistTopics/Time_1.html Explains the importance of concept of time in the history of mathematics, science and measurement.

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