Time Zone

A time zone is a region of the earth that has uniform standard time, usually referred to as the local time. Time zones are divided into standard and daylight saving (or summer). Daylight saving time zones (or summer time zones) include an offset (typically +1) for daylight saving time.

NZT(New Zealand Time)

Time difference ahead of GMT = +12 hours
Caroline Islands, Pacific Ocean (area East of 160 Degrees East)., U.S.A., Ellice Islands (British), Western Pacific, Gilbert Islands (British)

Time difference ahead of GMT = +11½ hours
Nauru Islands (166°55' E; 0°-32' S), Norfolk Islands, Australia 29 Degrees S/170°E.

Time difference ahead of GMT = +11 hours and 20 minutes
Niue Islands, Pacific Ocean, Savage Islands, Pacific Ocean.

Time difference ahead of GMT = +11 hours
Kuril Islands, USSR (46°N; 160°E), New Caledonia Islands (21°30'S;166°E), Pacific New Hebrides, The 16°S;167°-30'E Ocean Island, Pacific (170°E), Ponape (US Pacific Trust Territory),Santa Cruz Islands, Solomon Islands } 8°S;158°E(Pacific), Truk (US Pacific Trust Territory), USSR; Long.142½ °E to 157½°E.

GST(Guan Standard Time)

Time difference ahead of GMT = +10 hours
Admiralty Islands (Australian Trust Territory) 147°E., Australian Capital Territory, Garoline Islands (West of 160°E)- (US Trust Territory), Guam (US Pacific Territory) 14° N; 145°E, Ladrone (Mariana) Islands 16° N; 146° US Territory, Lord Howe Islands, Pacific (159°-8'E/31°-46' South), New Guinea Papua Australian Trust Territory, New South Wales, Australia (except Broken Hill Area), Queensland, Tasmania, Australia, USSR 127½ ° to 142½ ° East Long (Khabarovsk, Vladivostok), Victroria, Australia.

SAST (South Australian Standard Time)

Time difference ahead of GMT = 9½ hours
Australia, Broken Hill Area of New South Wales, Australia, Northern Territory Australia, South Australia.

JST (Japan Standard Time)

Time difference ahead of GMT = 9 hours
China (Manchuria), Indonesia - Aru Islands, Kei Islands, Moluccas Islands, Tanimbar Islands, West Irian (ex Dutch New Guinea), Japan (and Jappen Islands), Korea (Democratic Republic of North), Korea (Republic of South), Schouten Islands (North of West Irian), 135° E/1-30° S., USSR Long. 112½° to 127½° East (Yakutsk, Chitinsk)

CCT (China Coast Time)

Time difference ahead of GMT = +8 hours
Australia (Western Australia), Brunei (British Borneo) 4° 55 ‘ N ; 114° 57 ‘ E., China (including Coast) (Certain parts keep Summer Time), Formosa (Taiwan), Hong Kong, Indonesia - Borneo, Celebes, Flores, Lombok, Timor Lomblem Island (south east of Celebes), Macau (Macao),(Portuguese Terr.) 22° 13' North ; 113° 33' East, Malayasia, Federation of (a) Sarawak (113°30'E ; 2°35'N), (b) Sabah (117°E ; 6°N), Pexcadores Islands (Formosa), Philippine Islands, Portuguese,Timor (Malay Archipelago), Savu, Indonesia (121 ° 30 ' S), Sumba, Indonesia (9° 30 ' South; 119 ° 40 ' East), Sumbawa, Indonesia (8° 26 ' South/ 117° 30' East), USSR: Long. East 97½° to 112½° (Irkutsk), Vietnam (South).

JT (Java Time)

Time difference ahead of GMT = +7½ hours
Malaysia, Federation of, Malaya, Singapore.

SST (South Sumatra Time)

Time difference ahead of GMT = +7 hours Cambodia, SE Asia, Christmas Islands, Indian Ocean (Australian Terr.), Indonesia - Bali, Bangka, Belitong, Java, Sumatra Laos, SE Asia, Natuna Islands (4° North, 108° East), Outer Mongolia, Rhio Archipelago (near Singapore), Thailand (Siam), USSR: Long. 82½ ° E to 97½ ° E. (Krasnoyarsk, New Siberia), Vietnam (North).

NST (North Sumatra Time)

Time difference ahead of GMT = +6½ hours
Myanmar (Burma), Cocos-Keeling Islands (Australian Terr.) 12° 12 ' South 96° 54 ' East.

Time difference ahead of GMT = +6 hours
Bangladesh, USSR : Long. 67½ ° to 82½ ° East

IST (Indian Standard Time)

Time difference ahead of GMT = +5½ hours
India, Andaman Islands, 12° N - 92° 40 ‘ E. (Indian Terr.), Laccadive, Minicoy and Amindivi Islands (Indian Terr.) 73° East/10 ° N, Nicobar Island 94° E ; 8 ° North (Indian).

BT (Baghdad Time)

Time difference ahead of GMT = +3 hours
Afars and Isas Territory, Aden, Comoro Islands, Ethiopia, Iraq, Kenya, Latvia, Lithuania, Estonia, Malagasy(Madagascar), Saudi Arabia, Socotra Islands, Somali Republic, Southern Yemen, Tanzania, Uganda, USSR Long. East 40 °, West of (Moscow, Ukraine and West)

EET (Eastern European Time)

Time difference ahead of GMT = +2 hours
Botswana, Bulgaria, Crete (Greece), Cyprus, Congolese Republic (Belgian, congo-Eastern Part including Costermansville, Elisabethville, Lusumba and Stanleyville), Finland, Greece, Israel, Jordan, Lebanon, Lesotho, Libya, Malawi, Mozambique, Romania, Zimbabwe, South Africa, Sudan, Swaziland, Syria, Turkey, Egypt, Zambia.

MET (Middle European Time) or CET (Central European Time)

Time difference ahead of GMT = +1 hour
Albania, Angola, Austria, Balearic Islands, Belgium, Burundi, Camerron, Central African Republic, Chad, Congo, Congolese Republic (Belgian Congo- Western part including Coquilhatvile and Leopaldville), Corsica Islands, Czechoslovakia, Dahomey, Fernando po, France, Equatorial Guinea, Gabon, Germany, Givralter, Hungary , Italy, Liechtenstein Luxemburg, Malta, Monaco, Netherlands, Nigeria, Norway, Poland, Twanda, Sardinia Islands, Sicilcy, Spain, Spitzbergen, Sweden, Switzerland, Tunisia, Yugoslavia.

GMT (Greenwich Mean Time)

GMT = 0 hours
Ascension Islands, Algeria, Canary Islands, Channel Islands, Faeroes, Gambia, Ghana, Guinea, Ireland, Ifni, Ivory Coast, Mali, Moroco, Niger, Portugal, Principe Islands, Sao Tome-do, Spanish Sahara, St. Helena, Senegal, Sierra Leone, Tangier, Togo, Tristan da Cunha, Upper Volta, United Kingdom, Northern Ireland.

WAT (West Africa Time)

Time difference behind GMT = - ¾ hours
Liberia

Time difference behind GMT = - 1 hours
Madeira Islands, Iceland, Portuguese Guinea, Azores Islands.

AT (Azores Time)

Time difference behind GMT = - 2 hours
Cape Verde Islands, Azores Islands (Port), Fernado Norohna Island, Greenland (Scoresby Sound), south Georgin Islands.

NST (New Foundland Standard Time)

Time difference behind GMT = - 3 ½ hours
Canada: Newfoundland, Labrador, Surinam (Dutch Guiana)

Time difference behind GMT = - 3 ¾ hours
Guyana.

AST (Atlantic Standard Time)

Time difference behind GMT = - 4 hours
Antigua Island, Argentina, Barbados, Brazil (Central), Bermuda, Bolivia Canada - Qubec (east of 68 ° W), North West Territories east of 68° W., New Brunswick, Nova Scotia, Prince Edward Islands. Chile, Falkland Islands, Greenland (Thule area), Grenada, Windward Island, Guadeloupe, French Guiana, Lesser Antilles, Windward and Leeward groups of Islands of West Indies including Anguilla, Barbuda, St. Kitts, Nevis, Montserrat, Dominica, Castries, Barbados, Grenada and Grenadines, Martinique. Virgin Islands(USA), Paraguay, Puerto Rico, St. Pierre, Trinidad and Tobago, Venezuela.
Note :- West Indies -Lesser Antilles, Curacao, Aruba and Banaine Islands observe Standard Time based on Long. 67 ½ West that is 4 ½ hours faster on GMT.

EST (Eastern Standard Time)

Time difference behind GMT = - 5 hours
Bahama Islands, Brazil (Territory of Acre)
Canada : Qubec west of long. 68° W.
North-West Territories 68° W to 85° W, Ontario east of 90° W and Ottawa.
Cayman Islands, Colombia, Cuba, Dominican Republic, Ecuador, Haiti, Greater Antilles, Jamaica, Panama Canal Zone (USA), Panama Republic, Peru United States of America : Georgia, Connecticut, Delaware, Florida, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Vermount, Virginia, Washington DC, West Virginia.

CST (Central Standard Time)

Time difference behind GMT = - 6 hours
British Honduras
Canada : Ontorio, East Saskatchewan.
Costa Rica, Guatemala, Honduras, Mexico (Mexico city only), Nicaragua, Salvador.
United States of America : Alabama, Arkansas, Ilinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Minnesota, Mississipi, Missouri, Nebraska, North Dakota, Oklahama, South Dakota, Tennessee, Texas, Wisconsin.

MST (Mountain Standard Time)

Time difference behind GMT = - 7 hours
Canada : Saskatchewan, North West Territories 102° to 120° W., Albreta.
Mexico : Sonora, Sinaloa, Nayarit Southern District of Lower California
United States of America : Arizona, Colorado, Idaho, Montana, New Mexico, South Dakota, Western part, Utah, Wyoming.

PST (Pacific Standard Time)

Time difference behind GMT = - 8 hours
Alaska (USA) - Southeast Coast, Ketchikan to Skagway
Canada : Columbia, North West Territories West of 120° W.
Mexico - Northern District of Lower California
United States of America : California, Nevada, Oregon, Washington State.

YST (Yukon Standard Time)

Time difference behind GMT = - 9 hours
Alaska (USA) - North of Cross Sound (Skagway) to 141° West.
Canada - Yukon.

AHST (Alaska-Hawai Standard Time)

Time difference behind GMT = - 10 hours
Alaska (USA) from 141° W to 162° W., Austral Islands, Christmas Islands (Pacific Ocean), Fanning Islands, Society Islands, Society Islands, Hawaii Islands, Low Archipelago (Tuamoti Arch.,), French Pacific Territory.

HST (Hawaiian Standard Time)

Time difference behind GMT = - 10½ hours
Cook Islands 20°S/160°W. (except Niue Whose Std. Time Based on meridian 170° West of Greenwich, is 11 hrs 20 mts. Slower to GMT), Raratonga.

NT (Nome Time) or BST (Bering Standard Time)

Time difference behind GMT = - 11 hours
Alaska (west coast, vi.e, 162°W to Western tip), Aleutian Islands (USA) Pacific(180°E/51°N.), Johnston Island, USA (17°N/169°W), Midway Islands (USA) 28°N/117° face="Times">W), Samoa, American (170°W/12°S).

Daylight Saving Time

Countries that observe daylight saving time are listed in the table below. They all save one hour in the summer and change their clocks some time between midnight and 3 am.

Beginning and ending days of Daylight Saving Time

Africa

Asia

Australia

Europe

North America

South America

Date from which Standard Time was adopted by various Countries

Note