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Time zones Wed - May, 12 2021

Untitled Document A time zone is a region on Earth that has a uniform standard time 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.

Los Angeles

New York




Standard time zones could be defined by geometrically subdividing the Earth's spheroid into 24 lunes (wedge-shaped sections), bordered by meridians each 15° of longitude apart. The local time in neighboring zones would differ by one hour, and the variation in the position of the sun from one end of the zone to the other (east vs. west) would be at most 1/24th of the sky. Most of the 25 nautical time zones (specifically UTC−11 to UTC+11) are indeed defined this way, and are 15° of longitude wide. An hourly zone in the central Pacific Ocean is split into two 7.5° wide zones (UTC±12) by the 180th meridian, part of which coincides with the International Date Line.

On land, it is more convenient for areas in close commercial or other communication to keep the same time, so time zones tend to follow the boundaries of countries and their subdivisions instead. Of the 40 time zones on land, most are offset from Coordinated Universal Time (UTC) by a whole number of hours (UTC−12 to UTC+14), but a few are offset by 30 or 45 minutes from a nearby hourly zone. Daylight saving time is used in some higher-latitude countries to manipulate clock time with respect to the position of the sun for parts of the year, typically by changing clocks by an hour. Many land time zones are skewed toward the west relative to the corresponding nautical time zones, which also creates a permanent daylight saving time-like offset. Computer operating systems use either UTC or a local time zone to time stamp events.

Time zones map

Time zones map (Last update: October 18, 2011)

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Time Zone Abbreviation

TimeZone Region (City) Time Zone
NZT New Zealand Time (Auckland, Wellington) GMT + 12:00
USZ9 Russia Time 9 (Vladivostok) GMT + 10:00
AEDT Australia Eastern Daylight Time (Canberra, Melbourne, Sydney) GMT + 10:00
AEST Australia Eastern Time (Brisbane) GMT + 10:00
ACDT Australia Central Daylight Time (Adelaide) GMT + 09:30
ACST Australia Central Time (Darwin) GMT + 09:30
USZ8 Russia Time 8 (Yakutsk) GMT + 09:00
JST Japan Time (Tokyo, Osaka, Nagoya) GMT + 09:00
USZ7 Russia Time 7 (Irkutsk, Ulaan Bataar) GMT + 08:00
CCT China Coastal Time (Beijing, Hong Kong) GMT + 08:00
AWST Australia Western Time (Perth) GMT + 08:00
USZ6 Russia Time 6 (Krasnoyarsk) GMT + 07:00
ICT Indochina Time GMT + 07:00
USZ5 Russia Time 5 (Novosibirsk) GMT + 06:00
USZ4 Russia Time 4 (Ekaterinburg) GMT + 05:00
USZ3 Russia Time 3 GMT + 04:00
R2T Russia Time 2 (Moscow, St. Petersburg, Volgograd) GMT + 03:00
R1T Russia Time 1 GMT + 02:00
EET Eastern Europe Time (Athens, Istanbul, Minsk, Sofija ) GMT + 02:00
EAT East Africa Time GMT + 02:00
CET Central Europe Time (Belgrade, Bratislava, Budapest, Ljubljana, Prague, Brussels, Copenhagen, Madrid, Paris, Sarajevo, Skopje, Vilnius, Warsaw, Zagreb, Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna) GMT + 01:00
WET Western Europe Time (Dublin, Edinburgh, Lisbon, London) GMT + 00:00
EST Eastern Time (USA, Canada) GMT - 05:00
CDT Centeral Daylight Savings Time (USA, Canada) GMT - 05:00
CST Central Time (USA, Canada) GMT - 06:00
MST Mountain Time (USA, Canada) GMT - 07:00
PST Pacific Time (USA, Canada, Tijuana) >GMT - 08:00
AKST Alaska Std Time GMT - 09:00
AHST Alaska-Hawaii Std Time GMT - 10:00

Time Zone

TimeZone Region (City) Time Zone
GMT 1300 Nuku'alofa GMT + 13:00
GMT 1200 Fiji, Kamchatka, Marshall Is. GMT + 12:00
GMT 1100 Magadan, Solomon Is., New Caledonia GMT + 11:00
GMT 1000 Hobart, Brisbane, Guam, Port Moresby GMT + 10:00
GMT 0930   GMT + 09:30
GMT 0900 Seoul GMT + 09:00
GMT 0800 Urumqi, Taipei, Kuala Lumpur, Singapore GMT + 08:00
GMT 0700 Bangkok, Hanoi, Jakarta GMT + 07:00
GMT 0630 Rangoon GMT + 06:30
GMT 0600 Sri Jayawardenepura, Almaty, Astana, Dhaka GMT + 06:00
GMT 0545 Kathmandu GMT + 05:45
GMT 0530 Calcutta, Chennai, Mumbai, New Delhi GMT + 05:30
GMT 0500 Islamabad, Karachi, Tashkent GMT + 05:00
GMT 0430 Kabul GMT + 04:30
GMT 0400 Baku, Tbilisi, Yerevan, Abu Dhabi, Muscat GMT + 04:00
GMT 0330   GMT + 03:30
GMT 0300 Tehran, Baghdad, Nairobi, Kuwait, Riyadh GMT + 03:00
GMT 0200 Helsinki, Riga, Tallinn, Harare, Pretoria, Cairo, Jerusalem GMT + 02:00
GMT 0100 West Central Africa GMT + 01:00
GMT Casablanca, Monrovia GMT
GMT -0100 Cape Verde Is., Azores GMT - 01:00
GMT -0200 Mid-Atlantic GMT - 02:00
GMT -0230   GMT - 02:30
GMT -0300 Brasilia, Buenos Aires, Georgetown, Greenland GMT - 03:00
GMT -0330 Newfoundland GMT - 03:30
GMT -0400 Atlantic Time (Canada), Santiago, Caracas, La Paz GMT - 04:00
GMT -0500 Bogota, Lima, Quito, Indiana (East) GMT - 05:00
GMT -0600 Central America, Mexico City, Saskatchewan GMT - 06:00
GMT -0700 Arizona GMT - 07:00
GMT -0800   GMT - 08:00
GMT -0900 Alaska GMT - 09:00
GMT -1000 Hawaii GMT - 10:00
GMT -1100 Midway Island, Samoa GMT - 11:00
GMT -1200 Eniwetok, Kwajalein GMT - 12:00



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