Local Time - The Free Encyclopedia - Wikipedia

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Atime zoneis a region on Earth that has a uniform for legal, commercial, and social purposes. In order for the same clock time to always correspond to the same portion of the day as the Earth rotates (for example, the sun being at its highest point every day around noon), different places on the Earth need to have different clock times. Time zones have been used in modern times so similarly situated cities can keep exactly the same time, for simplicity and ease of communication.

History Early timekeeping Railroad time Worldwide time zones Definition Notation of time ISO 8601 UTC Offsets from UTC Abbreviations UTC offsets worldwide UTC 12:00 . UTC 07:00 UTC 06:00 . UTC 01:00 UTC 00:00 . UTC+05:45 UTC+06:00 . UTC+11:30 UTC+12:00 . UTC+14:00 Oceania / North America / Antarctica North and South America / Antarctica Africa / Asia / Antarctica Asia / Antarctica Asia / Oceania / Antarctica No DST in summer DST in summer No DST in summer DST in summer No DST in summer DST in summer No DST in summer DST in summer No DST in summer DST in summer /N: US - /N: US - /N: GB , PT -, - / KI -, RU - /S: NZ - / /S: NZ /N: US - BO, CO, PA, PE /N: - TN, CG, CD-, DZ, NE , NG /N: AT, BA, BE, CH, CZ, DE , ES-, FR, HR, HU, IT, LI, LU, MK, S: NA -, MN-, VN, LA, TH, KH, - / - / /S: AQ - Europe: BY /N: , , , BG, GR, MD, RO, TR CN, HK, ID -, MN-, MY, -, SG, TW, / - /S: CA - / /S: BR - Europe: BY, RU -, Africa: KE, SD, SO, SS, ER, Asia: IQ, SA / JP , KP, KR, ID - / / / - /N: -, - / -, / - / /N: -, - / -, PK / - / XX = ISO 3166-1 alpha-2 country code, XX- = parts of the country, N = North, S = South, UTC = Daylight Saving Time List of UTC offsets Time zone Example time (ISO 8601 notation) Example locations Example locations that in summer use DST 2011-11-04T03:04:26 Baker Island , Howland Island (both uninhabited) 2011-11-04T04:04:26 American Samoa , Samoa 2011-11-04T05:04:26 Aleutian Islands , Hawaii ) 2011-11-04T05:34:26 Marquesas Islands 2011-11-04T06:04:26 Gambier Islands Alaska ) 2011-11-04T07:04:26 Canada (most of Mexico (Baja California ), California , most of Nevada , most of , ) 2011-11-04T08:04:26 Mexico (Sonora ), ( ) Canada (Alberta ), Mexico (Chihuahua ), Colorado ) 2011-11-04T09:04:26 Costa Rica , El Salvador , Ecuador (Gal pagos Islands ), Honduras , Mexico (most), Nicaragua , Canada (Manitoba , Saskatchewan ), Illinois , most of ) 2011-11-04T10:04:26 Colombia , Ecuador (continental), Haiti , Jamaica , Panama , Peru Canada (most of Ontario , most of Florida , Georgia , Massachusetts , most of Michigan , New York , North Carolina , Ohio , ) 2011-11-04T10:34:26 2011-11-04T11:04:26 Bolivia , Amazonas ), Chile (continental), Dominican Republic , Canada (Nova Scotia ), Paraguay , , 2011-11-04T11:34:26 Canada (Newfoundland ) 2011-11-04T12:04:26 ( , , ), most of , 2011-11-04T13:04:26 Fernando de Noronha ), South Georgia and the South Sandwich Islands 2011-11-04T14:04:26 Portugal (Cape Verde 2011-11-04T15:04:26 Faroe Islands , Ghana , Iceland , Senegal continental and Madeira ), Spain (Canary Islands ), Morocco , 2011-11-04T16:04:26 Angola , Cameroon , Nigeria , Albania , Algeria , Belgium , Bosnia and Herzegovina , Spain (continental), Denmark , Germany , Kinshasa , Kosovo , Macedonia , France (metropolitan ), the Netherlands , Norway , Poland , Serbia , Slovakia , Slovenia , , 2011-11-04T17:04:26 Libya , Egypt , Malawi , Mozambique , South Africa , , Estonia , Finland , Israel , Jordan , Latvia , Lebanon , Lithuania , Moldova , Palestine , , , , 2011-11-04T18:04:26 Belarus , Djibouti , Kenya , Madagascar , Russia (Kaliningrad Oblast ), Saudi Arabia , South Sudan , Somalia , South Sudan , , , 2011-11-04T18:34:26 2011-11-04T19:04:26 Georgia , Mauritius , Oman , Seychelles , 2011-11-04T19:34:26 Afghanistan 2011-11-04T20:04:26 Kazakhstan (West), Maldives , Pakistan , 2011-11-04T20:34:26 India , 2011-11-04T20:49:26 Nepal 2011-11-04T21:04:26 Kazakhstan (most), Bangladesh , Chelyabinsk Oblast ) 2011-11-04T21:34:26 Cocos Islands , 2011-11-04T22:04:27 Jakarta , Russia (Novosibirsk Oblast ), , 2011-11-04T23:04:27 China , Hong Kong , Russia (Malaysia , Philippines , Singapore , , most of Mongolia, 2011-11-05T00:04:27 East Timor , Russia (Japan , North Korea , South Korea 2011-11-05T00:34:27 Northern Territory ) South Australia ) 2011-11-05T01:04:27 Russia ( ) New South Wales , , , ) 2011-11-05T01:34:27 Lord Howe Island 2011-11-05T02:04:27 New Caledonia , Russia (Solomon Islands 2011-11-05T02:34:27 Norfolk Island 2011-11-05T03:04:27 Fiji , Russia (Kamchatka Krai ) New Zealand 2011-11-05T03:49:27 Chatham Islands 2011-11-05T04:04:27 2011-11-05T05:04:27 Kiribati (Line Islands ) Time zone conversions "time in zone A" "UTC offset for zone A" = "time in zone B" "UTC offset for zone B", "time in zone B" = "time in zone A" "UTC offset for zone A" + "UTC offset for zone B". time in Los Angeles = 09:30 ( 05:00) + ( 08:00) = 06:30 time in Delhi = 09:30 ( 05:00) + (+5:30) = 20:00 Nautical time zones Skewing of zones Daylight saving time Additional information Internet and computer systems Operating systems Unix Microsoft Windows Programming languages Java JavaScript PHP Python 22] Negated time zone offset in seconds is stored time.timezone and time.altzone attributes. Smalltalk Databases TIMESTAMP WITH TIME ZONE TIMESTAMP WITHOUT TIME ZONE Oracle TIMESTAMP WITH TIME ZONE Stores date and time information with the offset from UTC TIMESTAMP WITH LOCAL TIME ZONE Stores date and time information with respect to the dbtimezone (which cannot be changed so long as there is a column in the db of this type), automatically adjusting the date and time from the stored time zone to the client's session time zone. PostgreSQL TIMESTAMP WITH TIME ZONE Stores date and time in UTC and converts to the client's local time zone (which could be different for each client) for display purposes. TIMESTAMP WITHOUT TIME ZONE Stores date and time without any conversion on input or output. Applications Microsoft Outlook Time zones in outer space See also References

Economics of Time Zones PDF (1.89 MB)

Historymatters.gmu.edu

ISBN 978-0-7858-2573-9 ; ISBN 0-7858-2573-8 ; BINC: 3099794. pp 31

Cooper, Bruce C. Central Pacific Railroad Photographic History Museum 2005

Annual report of the Commissioner of Railroads made to the Secretary of the Interior for the year ending June 30, 1883 , pp. 19 20. Washington, DC: Government Printing Office, 1883.

from scienzagiovane, Bologna University, Italy.

Gianluigi Parmeggiani (Osservatorio Astronomico di Bologna),

The Astronomical Almanac 1983, U S Government Printing Office (Washington) and Her Majesty's Stationery Office (London), page B4.

Bowditch, Nathaniel. American Practical Navigator. Washington: Government Printing Office, 1925, 1939, 1975.

Hill, John C., Thomas F. Utegaard, Gerard Riordan. Dutton's Navigation and Piloting. Annapolis: United States Naval Institute, 1958.

ISBN 0-19-215948-8 .

Doug O'Hara (2007-03-11). .

Canonical Ltd. . 2008-08-06.

International CNN

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