Time zone
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Time zones are areas of the Earth that have adopted the same standard time, usually referred to as the local time. Formerly, people used local solar time (originally apparent and then mean solar time), resulting in time differing slightly from town to town. As telecommunications improved and with the expansion of the railways this became increasingly awkward. Time zones partially rectified the problem by setting the clocks of a region to the same mean solar time. Time zones are generally centered on meridians of a longitude that is a multiple of 15? thus making neighboring time zones one hour apart. However, the one hour separation is not universal and, as the map below shows, the shapes of time zones can be quite irregular because they usually follow the boundaries of states, countries or other administrative areas.
All time zones are defined relative to Coordinated Universal Time (UTC). The reference point for Time Zones is the Prime Meridian (longitude 0?) which passes through the Royal Greenwich Observatory in Greenwich, London, United Kingdom [1] (http://greenwichmeantime.com/). For this reason the term Greenwich Mean Time (GMT) is still often used (by the BBC, for example, amongst others) to denote the "base time" to which all other time zones are relative. UTC is, nevertheless, the official term for today's atomically measured time as distinct from time determined by astronomical observation as formerly carried out at Greenwich.
GMT (UTC) is, incidentally, local time at Greenwich itself only between 01:00 UTC on the last Sunday in October and 01:00 UTC on the last Sunday in March. For the remainder of the year local time is UTC + 1—known in the UK as British Summer Time (BST).
The time for a location is given relative to UTC. Some examples:
- Los Angeles, California, USA: UTC − 8 (e.g. if it is 12:00 UTC, then it is 04:00 in Los Angeles)
- Toronto, Ontario, Canada: UTC − 5 (e.g. if it is 11:00 UTC, then it is 06:00 in Toronto)
- Stockholm, Sweden: UTC + 1 (e.g. if it is 12:00 UTC, then it is 13:00 in Stockholm)
- Istanbul, Turkey: UTC + 2 (e.g. if it is 03:00 UTC, then it is 05:00 in Istanbul)
- Mumbai, India: UTC + 5.5 (e.g. if it is 13:00 UTC, then it is 18:30 in Mumbai)
- Tokyo, Japan: UTC + 9 (e.g. if it is 11:00 UTC, then it is 20:00 in Tokyo)
Where the adjustment for time zones results in a time the other side of midnight from UTC, then the date at the location is one day later or earlier. Some examples:
- Cairo, Egypt: UTC + 2 (e.g. if it is 23:00 UTC on Monday 15 March, then the time in Cairo is 01:00, Tuesday 16 March)
- Auckland, New Zealand: UTC + 12 (e.g. if it is 21:00 UTC on Wednesday 30 June, then the time in Auckland is 09:00, Thursday 1 July)
- New York, USA: UTC − 5 (e.g. if it is 02:00 UTC on Tuesday, then the time in NY is 21:00 on Monday)
- Honolulu, Hawai'i, USA: UTC − 10 (e.g. if it is 06:00 UTC on Monday 1 May, then the time in Honolulu is 20:00, Sunday 30 April)
Note: The time zone adjustment for a specific location may vary due to the use of daylight saving time.
- e.g. New Zealand which is usually UTC + 12, observes a one-hour daylight saving time adjustment during the southern hemisphere summer resulting in a local time of UTC + 13!
See also: Sidereal time Calculating local time
History
The first time zone in the world was established by British railways on December 1, 1847—Greenwich Mean Time (GMT) being hand carried on chronometers. About August 23, 1852, time signals were first transmitted by telegraph from the Royal Greenwich Observatory. Even though 98% of the Great Britain's public clocks were using GMT by 1855, it was not made Britain's legal time until August 2, 1880. This paragraph only applies to the island of Great Britain, not to the island of Ireland.
On November 2, 1868, New Zealand officially adopted a standard time to be observed nationally, and was perhaps the first country to do so. It was based on the longitude 172? 30' East of Greenwich, that is 11 hours 30 minutes ahead of Greenwich Mean Time. This standard was known as New Zealand Mean Time.
Multiple time zones were first proposed by Charles F. Dowd about 1863 for American railroads as a teacher to his students. In 1870, after consulting railroad officials in 1869, he proposed four ideal time zones, the first centered on Washington, DC, but by 1872 the first was centered 75?W of Greenwich with geographic borders. American and Canadian railroads implemented their own version on Sunday, November 18, 1883, when each railroad station clock was either advanced or delayed as noon, standard time, was reached within each time zone, east to west. The zones were named Intercolonial, Eastern, Central, Mountain, and Pacific. Within one year, 85% of all cities having populations over 10,000, about 200 cities, were using standard time. A notable exception was Detroit, Michigan, which kept local time until 1900, then vacillated between Central Standard Time, local mean time, and Eastern Standard Time until it settled on EST by ordinance May 1915, ratified by popular vote August 1916. This hodgepodge was made uniform when Standard zone time was made legal by the U.S. Congress in 1918.
Time zones were first proposed for the entire world by Canada's Sir Sandford Fleming in 1876 as an appendage to the single 24-hour clock he proposed for the entire world (located at the center of the Earth and not linked to any surface meridian!). In 1879 he specified that his universal day would begin at the anti-meridian of Greenwich (now called 180?), while conceding that hourly time zones might have some limited local use. He continued to advocate his system at subsequent international conferences. In October 1884 the International Meridian Conference did not adopt his time zones because they were not within its purview. The conference did adopt a universal day of 24 hours beginning at Greenwich midnight, but specified that it "shall not interfere with the use of local or standard time where desirable." Nevertheless, most major countries had adopted hourly time zones by 1929. Even today, they have not been fully realized, with several time zones keeping a standard time that is not offset by a number of whole hours from Greenwich Mean Time.
Before 1920, all ships kept local apparent time on the high seas by setting their clocks at night or at the morning sight so that, given the ship's speed and direction, it would be 12 o'clock when the Sun crossed the ship's meridian (12 o'clock = local apparent noon). During 1917, at the Anglo-French Conference on Time-keeping at Sea, it was recommended that all ships, both military and civilian, should adopt hourly standard time zones on the high seas. Whenever a ship was within the territorial waters of any nation it would use that nation's standard time. The captain was permitted to change his ship's clocks at a time of his choice following his ship's entry into another time zone—he often chose midnight. These zones were adopted by all major fleets between 1920 and 1925 but not by many independent merchant ships until World War II.
Time on ship's clocks and in a ship's log had to be stated along with a "zone description", which was the number of hours that was to be added to zone time to obtain GMT, hence zero in the Greenwich time zone, and negative numbers from −1 to −12 for time zones to the east and positive numbers from +1 to +12 to the west (hours, minutes, and seconds for nations without an hourly offset). These signs are opposite to those given below because ships must obtain GMT from zone time, not zone time from GMT. All zones were pole-to-pole staves 15? wide except for −12 and +12, which were each 7.5? wide separated by a longitude of 180?. Unlike the zig-zagging land-based International Date Line, the nautical International Date Line follows 180? except where it is interrupted by territorial waters and the lands they border, including islands. About 1950, a letter suffix was added to the zone description, assigning Z to the zero zone, and A-M (except J) to the east and N-Y to the west (J may be assigned to local time in non-nautical applications). These were to be vocalized using a phonetic alphabet which included Zulu for GMT.
These nautical letters have been added to some time zone maps, like the map of Standard Time Zones (http://aa.usno.navy.mil/faq/docs/world_tzones.html) by Her Majesty's Nautical Almanac Office (NAO), which extended the letters by adding an asterisk (*) or dagger (†) for areas that do not use a nautical time zone, and a double dagger (‡) for areas that do not have a legal standard time (Greenland's ice sheet and all of Antarctica—Britain specifies UTC − 3 for the Antarctic Peninsula, but no other country recognizes that). They conveniently ignore any zone that does not have an hour or half-hour offset, so a double dagger (‡) has been co-opted for these zones below.
In maritime usage, GMT retains its historical meaning of UT1, the mean solar time at Greenwich. UTC, atomic time at Greenwich, is too inaccurate, differing by as much as 0.9 s from UT1, creating an error of 0.4 km in longitude at the equator. However, DUT can be added to UTC to correct it to within 50 ms of UT1, reducing the error to only 20 m.
List of time zones and contained areas
Regions marked with asterisks (* or **) observe Daylight Saving Time: add 1 hour in summer (* for Northern Hemisphere summer; ** for Southern Hemisphere).
Some zones north-south of each other in the mid Pacific differ by 24 hours in time: they have the same time of the day but differ by a full day. The two extreme time zones on Earth (both in the mid Pacific) differ by 26 hours. A particular day starts earlier in countries with a more positive UTC offset. Thus the first occurrence of a date will be in UTC + 14 and the last of the same date in UTC − 12 (at sea). This gives the interesting feature that during one hour each day there are three different dates in use on land around the world, at 10:30 UTC Monday it is already 00:30 Tuesday in the Line Islands (UTC + 14) while the time is 23:30 Sunday in Samoa (UTC − 11) [2] (http://www.timeanddate.com/worldclock/full.html?sort=2).
Stations in Antarctica generally keep the time of their supply bases, thus both the Amundsen-Scott South Pole Station (U.S.) and McMurdo Station (U.S.) use New Zealand time (UTC + 12 southern winter, UTC + 13 southern summer). Time zone abbreviations are almost always customary, not legal—those listed here only exist in English and are somewhat arbitrary. English time zone names below generally only apply to English speaking areas. The CIA and NAO disagree on the time kept by some Russian oblasts, so both are given below—this may be due to a recent time zone change.
UTC − 12 Y
Only ships at sea within 7.5? east of 180?.
For Kwajalein, Eniwetok, and Bikini atolls, see note at UTC + 12 M.
UTC − 11 X
UTC − 10 W
- Cook Islands
- French Polynesia
- Society Archipelago including Tahiti,
- Tuamotu Archipelago, and
- Tubuai Islands
- Johnston Atoll
- Tokelau
- United States (HST—Hawaii-Aleutian Standard Time)
- Alaska
- Aleutian Islands (west of 169? 30' West)*
- Hawaii
- Alaska
UTC − 9:30 V*
UTC − 9 V
- French Polynesia
- United States (AKST—Alaska Standard Time)
- Alaska (most of state)*
UTC − 8 U
- Canada (PST—Pacific Standard Time; the corresponding daylight saving time is called Pacific Daylight Time (PDT, UTC − 7)
- British Columbia (most of province)*,
- Yukon*
- Mexico
- Pitcairn Islands
- United States (PST—Pacific Standard Time)
- California*
- Idaho*
- north of the Salmon River (between the Oregon state border and the Idaho County/Lemhi County border), and
- west of the Idaho County/Lemhi County border (between the Salmon River and the Montana state border)
- Nevada (most of state, except Idaho border towns and West Wendover)*
- Oregon (most of state, including southern 1/5 of Malheur County)*
- Washington*
UTC − 7 T
- Canada (MST—Mountain Standard Time)
- Alberta*,
- British Columbia
- northeastern (no DST)
- Most of Peace River Regional District except Fort Ware, Beatton River, Pink Mountain, Sikanni Chief, Buckinghorse River and Trutch
- southeastern*
- Regional District of East Kootenay,
- Regional District of Central Kootenay east of the Kootenay River and parts east of Kootenay Lake that are south of and including Riondel (Creston doesn't observe DST), and
- Columbia-Shuswap Regional District east of the Selkirk Mountains,
- northeastern (no DST)
- Northwest Territories*,
- Nunavut*
- west of 102? West, and
- entire Kitikmeot Region,
- Saskatchewan
- Lloydminster and surrounding area* (specifically exempted from the legal prohibition of DST in Saskatchewan)
- Mexico
- Baja California Sur*,
- Chihuahua*,
- Nayarit* (most of state)
- Sinaloa*,
- Sonora
- United States (MST—Mountain Standard Time)
- Arizona (Navajo Nation does observe DST),
- Colorado*,
- Idaho*
- south of the Salmon River (between the Oregon state border and the Idaho County/Lemhi County border), and
- east of the Idaho County/Lemhi County border (between the Salmon River and the Montana state border),
- Kansas*
- Montana*,
- Nebraska (western)*,
- Nevada*
- Duck Valley Indian Reservation, plus the towns of Mountain City and Owyhee,
- Jackpot, and
- West Wendover,
- New Mexico*,
- North Dakota (southwestern)*,
- Oklahoma
- Kenton*,
- Oregon
- northern 4/5 of Malheur County*,
- South Dakota (western)*,
- Texas*
- El Paso County,
- Hudspeth County, and
- northwestern Culberson County (Guadalupe Mountains National Park area),
- Utah*,
- Wyoming*
UTC − 6 S
- Belize
- Canada (CST—Central Standard Time)
- Manitoba*,
- Nunavut
- between 85? West and 102? West (except eastern Kitikmeot Region and western Southampton Island)*,
- Ontario*
- Northwestern Ontario west of 90? West (except Atikokan area, New Osnaburgh and Pickle Lake area, and Shebandowan and Upsala area), and Big Trout Lake area east of 90? West,
- Saskatchewan (most of province), except
- Creighton and Denare Beach area, which does observe DST (unofficially, as Saskatchewan has a law prohibiting the use of DST)
- Lloydminster and surrounding area, which observes Mountain Standard Time (UTC-7) with DST by special legal exemption
- Chile
- Costa Rica
- Ecuador
- El Salvador
- Guatemala
- Honduras
- Mexico*
- all other states not already mentioned, plus
- Distrito Federal
- Nayarit
- some of Nuevo Vallarta
- Nicaragua*
- United States (CST—Central Standard Time)
- Alabama (most of state)*,
- Arkansas*,
- Florida
- west of the Apalachicola River, except for the portions of Franklin County and Gulf County south of the Intracoastal Waterway*,
- Illinois*,
- Indiana*
- northwestern
- southwestern
- Iowa*,
- Kansas (most of state)*,
- Kentucky (western)*,
- Louisiana*,
- Michigan*
- Minnesota*,
- Mississippi*,
- Missouri*,
- Nebraska (central and eastern)*,
- North Dakota (most of state)*,
- Oklahoma (most of state)*,
- South Dakota (eastern)*,
- Tennessee*
- Texas (most of state)*,
- Wisconsin*
UTC − 5 R
- Bahamas*
- Brazil
- Canada (EST—Eastern Standard Time)
- Cayman Islands
- Colombia
- Cuba*
- Ecuador
- Haiti
- Jamaica
- Panama
- Peru
- Turks and Caicos Islands*
- United States (EST—Eastern Standard Time)
- Alabama Phenix City only*,
- Connecticut*,
- Delaware*,
- District of Columbia*,
- Florida
- east of the Apalachicola River, plus the portions of Franklin County and Gulf County south of the Intracoastal Waterway, west of the Apalachicola River*,
- Georgia*,
- Indiana (most of state), except
- Clark County,
- Dearborn County,
- Floyd County,
- Harrison County, and
- Ohio County, which do unofficially observe DST,
- Kentucky (eastern)*,
- Maine*,
- Maryland*,
- Massachusetts*,
- Michigan (most of state)*,
- New Hampshire*,
- New Jersey*,
- New York*,
- North Carolina*,
- Ohio*,
- Pennsylvania*,
- Rhode Island*,
- South Carolina*,
- Tennessee*
- East Tennessee, except Marion County
- Vermont*,
- Virginia*,
- West Virginia*
UTC − 4 Q
- Anguilla
- Antigua and Barbuda
- Aruba
- Barbados
- Bermuda*
- Bolivia
- Brazil
- Amazonas (all but southwestern tip),
- Mato Grosso**,
- Mato Grosso do Sul**,
- Parἐarᠨwestern),
- Rond?,
- Roraima
- Canada (AST— Atlantic Standard Time)
- Labrador (all but southeastern tip)*,
- New Brunswick*,
- Nova Scotia*,
- Prince Edward Island*,
- Quebec (east of the Natashquan River) (NAO)
- Quebec (east of the 63?W longitude) (CIA)
- Chile**
- Dominica
- Dominican Republic
- Falkland Islands**
- Greenland - Kalaallit Nunaat
- northwestern
- Pituffik area* (observes United States DST rules)
- northwestern
- Grenada
- Guadeloupe
- Guyana
- Martinique
- Montserrat
- Netherlands Antilles
- Paraguay**
- Puerto Rico (AST—Atlantic Standard Time)
- Saint Kitts and Nevis
- Saint Lucia
- Saint Vincent and the Grenadines
- Trinidad and Tobago
- Venezuela
- Virgin Islands
- British Virgin Islands and
- U.S. Virgin Islands (AST—Atlantic Standard Time)
UTC − 3:30 P*
- Canada (NST—Newfoundland Standard Time)
- Labrador (southeastern)*,
- Newfoundland*
UTC − 3 P
- Argentina
- Brazil - official time
- Alagoas,
- [[Amap,
- Bahia (no DST since 2003),
- [[Cear,
- Distrito Federal**,
- Esp�to Santo**,
- [[Goi᳝]**,
- [[Maranh㯝],
- Minas Gerais**,
- Parἐarᠨeastern),
- Para�, [[Paran**,
- Pernambuco,
- [[Piau흝,
- Rio de Janeiro**,
- Rio Grande do Norte,
- Rio Grande do Sul**,
- Santa Catarina**,
- S㯠Paulo**,
- Sergipe,
- Tocantins
- French Guiana
- Greenland - Kalaallit Nunaat
- south coast and southwest coast* (observes European Union DST rules)
- Saint-Pierre and Miquelon*
- Suriname
- Uruguay**
UTC − 2 O
- Brazil - Ocean Islands
- Fernando de Noronha, Trindade, Martim Vaz, etc.
- South Georgia and the South Sandwich Islands
UTC − 1 N
- Cape Verde
- Greenland - Kalaallit Nunaat
- eastern
- Ittoqqortoormiit and surrounding area* (observes European Union DST rules)
- eastern
- Portugal
UTC Z
- Burkina Faso
- Bouvet Island
- C?d'Ivoire
- Faroe Islands*
- The Gambia
- Ghana
- Greenland - Kalaallit Nunaat
- northeastern
- Danmarkshavn and surrounding area
- northeastern
- Guinea
- Guinea-Bissau
- Iceland
- Ireland*
- Liberia
- Mali
- Mauritania
- Morocco
- Portugal*
- Saint Helena
- S㯠Tom頡nd Pr�ipe
- Senegal
- Sierra Leone
- Spain (not mainland)
- Togo
- United Kingdom* (GMT / BST)
- Western Sahara
UTC + 1 A
- Albania*
- Algeria
- Andorra*
- Angola
- Austria*
- Belgium*
- Benin
- Bosnia and Herzegovina*
- Cameroon
- Central African Republic
- Chad
- Congo, Republic of the
- Congo, Democratic Republic of the (Kinshasa, Bandundu, Bas-Zaire, Equateur)
- Croatia*
- Czech Republic*
- Denmark*
- Equatorial Guinea
- France*
- Gabon
- Germany*
- Gibraltar*
- Hungary*
- Italy*
- Liechtenstein*
- Luxembourg*
- Macedonia, Republic of*
- Malta*
- Monaco*
- Montenegro*
- Namibia**
- Netherlands*
- Niger
- Nigeria
- Norway*
- Poland*
- San Marino*
- Serbia*
- Slovakia*
- Slovenia*
- Spain* (except Canary Islands).
- Svalbard and Jan Mayen*
- Sweden*
- Switzerland*
- Tunisia*
- Vatican City*
UTC + 2 B
- Belarus*
- Botswana
- Bulgaria*
- Burundi
- Congo, Democratic Republic of the (Kasai Occidental, Kasai Oriental, Haut-Zaire, Katanga)
- Cyprus*
- Egypt*
- Estonia*
- Finland*
- Gaza Strip*
- Greece*
- Israel*
- Jordan*
- Latvia*
- Lebanon*
- Lesotho
- Libya
- Lithuania*
- Malawi
- Moldova*
- Mozambique
- Romania*
- Russia (Kaliningrad)*
- Rwanda
- South Africa
- Swaziland
- Syria*
- Turkey*
- Ukraine*
- West Bank*
- Zambia
- Zimbabwe
UTC + 3 C
- Bahrain
- Comoros
- Djibouti
- Eritrea
- Ethiopia
- Georgia* ([3] (http://news.bbc.co.uk/2/hi/europe/3843511.stm), "same as Moscow", "three hours ahead of London", the text "GMT + 4" in the link apparently refers to the situation in summer)
- Iraq*
- Kenya
- Kuwait
- Madagascar
- Mayotte
- Qatar
- Russia* (most of European portion, including Moscow, St. Petersburg, Rostov on Don, Novaya Zemlya, Franz Josef Land, and all railroads throughout Russia)
- Saudi Arabia
- Somalia
- Sudan
- Tanzania
- Uganda
- Yemen
UTC + 3:30 C*
- Iran*
UTC + 4 D
UTC + 4:30 D*
UTC + 5 E
- British Indian Ocean Territory (NAO)
- Heard Island and McDonald Islands
- Kazakhstan (Western)
- Kyrgyzstan*
- Maldives
- Pakistan
- Russia
- Astrakhan* (CIA)
- Bashkortostan*
- Chelyabinsk*
- Kurgan*
- Orenburg*
- Perm*
- Saratov* (CIA)
- Sverdlovsk* (incl. Yekaterinburg)
- Tyumen*
- Ulyanovsk* (CIA)
- Volgograd* (CIA)
- Tajikistan
- Turkmenistan
- Uzbekistan
UTC + 5:30 E*
- India (IST—Indian Standard Time)
UTC + 5:45 E‡
Nepal's time zone of UTC + 5:45 was adopted in 1986 [4] (http://www.sptimes.com/Travel97/10198/To_Every_Times__There.html). This is the nearest quarter-hour from Greenwich to the local mean time of Nepal's capital Kathmandu, which is at 85?19'E or 5:41:16. Old CIA maps, 1995 and earlier, have Nepal at 5:40, which may be their approximation of Kathmandu's local mean time.
UTC + 6 F
- Bangladesh
- Bhutan
- British Indian Ocean Territory (CIA)
- Kazakhstan (Eastern)
- Russia
- Altai Krai*
- Altai Republic*
- Novosibirsk*
- Omsk*
- Tomsk* (NAO),
- Sri Lanka
UTC + 6:30 F*
UTC + 7 G
- Cambodia
- Christmas Island (Australia)
- Indonesia (Western)
- Laos
- Mongolia* (part of western Mongolia)
- Russia
- Kemerovo*
- Khakassia*
- Krasnoyarsk* (incl. Severnaya Zemlya)
- Tomsk* (CIA),
- Tuva*
- Thailand
- Vietnam
UTC + 8 H
- Australia (AWST—Australian Western Standard Time)
- Western Australia (most of state)
- Brunei
- People's Republic of China, including mainland China, Hong Kong and Macau
- Indonesia (Central)
- Malaysia
- Mongolia* (most of country)
- Philippines
- Russia
- Singapore
- Republic of China (Taiwan)
Note that the whole of mainland China has the same time, which makes this time zone exceptionally wide. In the extreme west of the PRC the sun is at its highest at 15:00, in the extreme east at 11:00. It also means that on the short (76 km) frontier with Afghanistan, the official time change is 3 hours and 30 minutes.
UTC + 8:45 H‡
- Australia
- Western Australia
- Caiguna-Eucla-Border Village (far south-eastern part of state)
- Western Australia
UTC + 9 I
- East Timor
- Indonesia (Eastern)
- Japan (JST—Japan Standard Time)
- North Korea
- South Korea (KST—Korea Standard Time)
- Palau
- Russia
UTC + 9:30 I*
- Australia (ACST—Australian Central Standard Time)
UTC + 10 K
- Australia (AEST—Australian Eastern Standard Time)
- Australian Capital Territory**,
- New South Wales** (except Broken Hill, which observes South Australia time),
- Queensland,
- Tasmania** (which observes DST starting on the first weekend of October instead of the last),
- Victoria**
- Guam (Chamorro Standard Time via US Law)
- Federated States of Micronesia
- Northern Mariana Islands (Chamorro Standard Time via US law)
- Papua New Guinea
- Russia
- Primorsky (incl. Vladivostok and Sakhalin Island)*
- Khabarovsk*
- Sakha* (central portion, incl. New Siberian Islands)
UTC + 10:30 K*
- Australia
- New South Wales
- Lord Howe Island** (DST only 0:30)
- New South Wales
UTC + 11 L
UTC + 11:30 L*
UTC + 12 M
- Fiji
- Kiribati
- Marshall Islands
- Nauru
- New Zealand**
- Russia
- Chukotka*
- Kamchatka (incl. Kuril Islands)*
- Tuvalu
- Wake Island
- Wallis and Futuna
Kwajalein, Eniwetok, and Bikini atolls in the Marshall Islands used to be on UTC−12. Kwajalein advanced 24 hours to the eastern hemisphere side of the International Date Line by skipping 21 August 1993. Eniwetok and Bikini probably advanced even earlier, when the U.S. military relinquished its control of them. [5] (http://pqasb.pqarchiver.com/nytimes/116416799.html?did=116416799&FMT=ABS&FMTS=AI&date=Aug+22%2C+1993&desc=In+Marshall+Islands%2C+Friday+Is+Followed+by+Sunday)
UTC + 12:45 M‡
UTC + 13 M*
- Kiribati
- Phoenix Islands Formerly UTC-11, advanced by skipping 31 December 1994
- Tonga
UTC + 14 M†
- Kiribati
- Line Islands Formerly UTC-10, advanced by skipping 31 December 1994
See also
Bibliography
- 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.
- Howse, Derek. Greenwich Time and the Discovery of the Longitude. Oxford: Oxford University Press, 1980. ISBN 0192159488.
External links
- Time Genie (http://www.timegenie.com/) Find the current time and date for more than 6,600 cities in 245 countries. Also includes tools for converting and comparing times.
- World Time Server (http://www.worldtimeserver.com/)
- The E Time zone page (http://timezones.tk) - Clock, Time and Zones - View the day and night timezone clock around the world at the E Time zone page
- Watch Time Zone Database (http://www.watchtimezone.com/)
- Virtual Travelog (http://www.virtualtravelog.net/entries/000031.html) A Solution for Managing Time Zones, and Dates in International Internet Systems
- The tz database (http://www.twinsun.com/tz/tz-link.htm) provides specific information on the beginning and ending dates of daylight saving time for each zone and tracks time zones over the years.
- Time around the World (http://time.world-stay.com/en/) information about the time in locations all over the world, including daylight maps, sunrise and sunset times and free clocks that can be added to a web page
- US Official Time Clock (http://www.time.gov/timezone.cgi?UTC/s/0/java) is java enabled to graphically display night and day around the globe.