Gourt > Reference > Time (4)
Time has long been a major subject of philosophy, art, poetry, and science. There are widely divergent views about its meaning; hence it is difficult to provide an uncontroversial definition of time. Scholars disagree on whether time itself can be measured or is itself part of the measuring system. Many fields use an operational definition in which the only definition attempted is that of the units used.
The measurement of time has also occupied scientists and technologists, and was a prime motivation in astronomy. Time is also a matter of significant social importance, having economic value ("time is money") as well as personal value, due to an awareness of the limited time in each day and in our lives. Units of time have been agreed upon to quantify the duration of events and the intervals between them. Regularly recurring events and objects with apparent periodic motion have long served as standards for units of time. Examples are the apparent motion of the sun across the sky, the phases of the moon, and the swing of a pendulum.
Time has historically been closely related with space, most obviously with spacetime in Einstein's General Relativity.
More on [ Time ]
Time :: Astronomy and Space
Sky Calendars :: Amateur
Calendars and Timekeeping :: Astronomy
Geochronology :: Geology
Time Travel :: Relativity
Timelines :: History
Time and Timelessness :: Physics
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A Few Facts Concerning GMT, UT, and the RGO - Explains the differences between several time systems.
A Walk Through Time - Evolution of timekeeping through the centuries.
Meta Description: [ An illustrated history of timekeeping from ancient times to the present ]
Atomic Clock Time - Displayed in a variety of useful formats. Site is a front-end to U.S. government atomic clocks.
Calendar Studies - Information about calendar history and calendar reform.
Meta Description: [ Articles on the Gregorian and Julian calendars, the ISO date format, the Julian day number system, the Maya calendar, the Goddess lunar calendar, the Liberalia Triday Calendar and others. ]
Calendar Zone - A categorized collection of calendar related sites.
Meta Description: [ Comprehensive categorized calendar catalog currently
containing countless correlating connections & calzone recipes. Dates in Calendar are Closer
Than They Appear! (Formerly CalendarLand) ]
Calendar: A History - The history of the western calendar and the clock.
Meta Description: [ A History of the Western Calendar. Calendar a History. Including the Gregorian and Julian and Roman Calendars. How the Days of the Week and Months got their Names, BC and AD Inventor Dionysius Exiguss, When was the Zero in use, ]
Date Algorithms - Provides descriptions, proofs and computer programming implementation examples to convert dates to various calendar dates for Julian, Gregorian, and Rata Die calendars.
Meta Description: [ Date Algorithms ]
English Calendar - Includes an ecclesiastical calendar and a section on old and new style dating.
Meta Description: [ This site intended to replace handbooks of dates for students of English history and literature. It calculates the date of Easter and other ecclesiastical holidays, converts back and forth between Old and New style dates, and calculates day of the week. It is valid for all English dates from 325 ... ]
Infoplease: Daylight Saving Time - Information and history about Daylight Saving Time all over the world.
Meta Description: [ Starting in 2007, "daylight time" will be observed from the second Sunday in March to the first Sunday in November, adding about a month to the current daylight saving time (the first Sunday in April to the last Sunday in October). ]
International Standard Date and Time Notation - An overview of the ISO 8601 notation for dates.
Meta Description: [ International Standard ISO 8601 specifies numeric representations of date and time. It helps to avoid confusion caused by the many different national notations. ]
Light of Day - Shedding light on Queensland's daylight saving opposition.
NIST Time and Frequency Division - 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 - 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]
Meta Description: [ 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 U.S. adopted daylight-saving time as a way to squeeze more out of the day. David Prerau explores the curious history of DST. ]
The Calendar - Summarizes the history of various calendars developed and used over the centuries.
This Day In History - Today in history every day - often with pictures and sound.
Time - Provides descriptions of several standards of time.
Time FAQ - Frequently Asked Questions about time (from sci.astro news group)
Time References - To set your watch or clock accurately using a time reference. Explains the various options for residents of North America.
Time Zone and Daylight Saving Time Data - A directory of sites providing descriptions of civil timekeeping concepts, source code, databases, and maps.
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.
U.S. Time Zones - History of standard time in the U.S.
United States Code - Weights, measures and standard time.
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