Portal:Time Information & Portal:Time Links at HealthHaven.com

15:13, January 2, 2010 (UTC)
WELCOME TO THE TIME PORTAL

Time

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Time

Time is a fundamental component of measuring systems and has long been a major subject of art, philosophy, and science.

In physics and other sciences, time is considered a fundamental quantity; part of the basic structure of the universe, a dimension in which events occur in sequence. The unit of time in the International System of Units (SI) is the second...

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Time Help

↑ Current date & time at top of page; refresh or purge to update

Help:Variable
How to display time
WP:Date math
Wikipedia time coding
WP:Timeline
General timeline help

Help:Calendar
Time display examples
Portal:Current events
News & current events
WP:Timeline standards
Manual of Style listing

More Time & Date Templates:
Time, date and calendar templates
Date mathematics templates

↓ For Wikipedia articles, see TIME TOPICS below ↓

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Time Topics

Time (book) touches upon nearly every topic in some way. Some of the most relevant are below:

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Selected article

A chronometer watch is a watch tested and certified to meet certain precision standards. In Switzerland, only timepieces certified by the COSC may use the word 'Chronometer' on them. However, numerous prominent Swiss watch manufacturers do not submit their movements for COSC certification, although such movements would probably easily qualify as chronometers under the COSC certification rules.

The term chronometer is also used to describe a marine chronometer used for celestial navigation. The marine chronometer was invented by John Harrison in 1730. This was the first iteration of a series of chronometers which enabled accurate marine navigation. For the next 250 years, an accurate chronometer was essential to any kind of marine or air navigation until the implementation of global satellite navigation at the end of the 20th century. The marine chronometer is no longer used for navigation.

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Selected picture

Portal:Time/Selected picture archive/January 2010

Archive - Suggest a picture...

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Selected biography

Portal:Time/Selected biography archive/January 2010

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Did you know...

...that the second was known as a "second minute", the second small division of an hour.

...that the second is defined as the duration of 9,192,631,770 oscillations between the two hyperfine levels of the ground state in the Cesium-133 atom.

...that the smallest unit of time that could ever be measured is the Planck time (~ 5.4 × 10⁻⁴⁴ seconds).

..that despite Herodotus's claim that the sundial was invented in Babylon, the oldest known example is from Egypt?

... that merkhets were Ancient Egyptian timekeeping devices that tracked the movement of certain stars over the meridian in order to ascertain the time during the night, when sundials could not function?

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Things you can do - Carpe diem because Tempus fugit

Vital Articles

The Wikipedia 1.0 Editorial team identified the following articles relating to Time as Vital: "for which Wikipedia should have a corresponding high-quality article, and ideally a featured article." Those marked with this icon: are also considered to be Core articles, "one of the core set of articles every encyclopedia should have."

Their quality-scale rating as of February 2008 is listed alongside each:

Calendar - B
Clock - B
Day - B
History - B
Month - B
Second - B
Time - B
Week - B
Year - Start

Any help in improving these articles would not only further the efforts of WikiProject Time, but Wikipedia overall.

Evangelize the Portal!

Time portal

Spread the word by posting this portal link in the See Also sections of time-themed articles, using this code:

Note that the Time templates (posted in Topics on each page of this Portal) all contain a link back to the Portal, so if an article has one of those templates, it doesn't technically need another link.

Otherwise, knock yourselves out!

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Related portals

History	Physics	Science	Space	Technology

Wikipedia portals: Culture · Geography · Health · History · Mathematics · Natural sciences · Philosophy · Religion · Society · Technology

What are portals? · List of portals · Featured portals

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WikiProjects

WikiProject Time

Descendant WikiProjects

Related WikiProjects

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Associated Wikimedia

Time on Wikiquote Quotations

Time on Wikibooks Manuals & Texts

Time on Wikisource Texts

Time on Wiktionary Definitions

Time on Wikimedia Commons Images & Media

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Quotes

Tu ne quaesieris, scire nefas, quem mihi, quem tibi	Leuconoe, don't ask — it's dangerous to know —
finem di dederint, Leuconoe, nec Babylonios	what end the gods will give me or you. Don't play with Babylonian
temptaris numeros. ut melius, quidquid erit, pati.	fortune-telling either. Better just deal with whatever comes your way.
seu pluris hiemes seu tribuit Iuppiter ultimam,	Whether you'll see several more winters or whether the last one
quae nunc oppositis debilitat pumicibus mare	Jupiter gives you is the one even now pelting the rocks on the shore with the waves
Tyrrhenum: sapias, vina liques et spatio brevi	of the Tyrrhenian sea — be smart, drink your wine. Scale back your long hopes
spem longam reseces. dum loquimur, fugerit invida	to a short period. Even as we speak, envious time
aetas: carpe diem quam minimum credula postero.	is running away from us. Seize the day, trusting little in the future.

—Horace, Odes 1.11