Lub sij hawm cheeb tsam yog ib lub pob txaij conventionally kos rau saum npoo ntawm lub ntiaj teb nrog ib qhov dav txog 15 degrees. Raws li, Greenwich meridian lossis lub npe ntawm Greenwich meridian tau suav tias yog nruab nrab meridian ntawm lub sijhawm xoom. Kev tsim ntawm thaj chaw li no yuav siv sij hawm rau hauv qhov kev sib hloov ntawm lub ntiaj teb puag ncig nws lub axis, nrog rau txoj kev xav txo qis sib txawv hauv cov sijhawm hauv tib thaj chaw. Yog li thaj chaw ntau npaum li cas muaj thiab lawv yog dab tsi?
Cov Lus Qhia
Kauj ruam 1
Nws yog kev coj mus cais 40 lub sijhawm thaj chaw. Nov yog:
- UTC -12 lossis Yankee, uas yog hnub vas thib;
- UTC -11 lossis X-ray hauv Asmeskas Samoa;
- UTC -10 lossis Whisky hauv Hawaii;
- UTC -9 lossis Victor - Alaska;
- UTC -8 lossis Uniform - feem ntau ntawm Asmeskas thiab Canada;
- UTC -7 lossis Tango - qee feem ntawm Asmeskas thiab Canada, thiab Mexico;
- UTC -6 lossis Sierra - tib lub tebchaws li UTC 7;
- UTC -5 lossis Romeo - Tebchaws Asmeskas, Canada, Bogota, Lima thiab Quito;
- UTC -4: 30 poob rau Caracas;
- UTC -4 lossis Quebec - Canada La Paz thiab Santiago;
- UTC -3: 30 poob rau Newfoundland;
- UTC -3 lossis Papa hauv Greenland, Brasilia thiab Buenos Aires;
- UTC -2 lossis Oscar, npog thoob plaws Hiav Txwv Atlantic;
- UTC -1 lossis Kaum Ib Hlis - Azores;
- UTC 0 lossis Zulu - Dublin, Lisbon thiab London;
- UTC +1 lossis Alpha ntog rau Amsterdam, Zagreb, Berlin, Sarajevo, Bern, Prague, Brussels, Ljubljana, Copenhagen, Warsaw, Madrid, Budapest, Paris, Bratislava, Rome, Belgrade, Stockholm thiab Rome;
- UTC +2 lossis Bravo, uas suav nrog cov nroog thiab cov tebchaws xws li Athens, Turkey, South Africa, Bucharest, Libya, Vilnius, Lebanon, Kiev, Ixayees, Chisinau, Egypt, Riga, Helsinki, Sofia, Tiraspol thiab Tallinn;
- UTC +3 lossis Charlie - Kaliningrad, Qatar, Minsk, Kuwait, Yemen, Iraq;
- UTC +3: 30 hu ua Tehran sijhawm;
- UTC +4 lossis Delta - Moscow lub sijhawm;
- UTC +4: 30 ntog rau thaj chaw ntawm Afghanistan;
- UTC +5 lossis Echo - thaj chaw ntawm Kazakhstan, Uzbekistan, Pakistan, Turkmenistan thiab Tajikistan;
- UTC +5: 30 hauv Is Nrias teb thiab Sri Lanka;
- UTC +5: 45 hauv Nepal;
- UTC +6 lossis Foxtrot hauv Lavxias Yekaterinburg;
- UTC +6: 30 - Myanmar;
- UTC +7 lossis Golf hauv Lavxias Siberian nroog (Omsk, Novosibirsk, Kemerovo);
- UTC +8 lossis Tsev So - Krasnoyarsk, Ulan Bator, Taiwan, Singapore, Hong Kong;
- UTC +8: 45 suav nrog tsib lub nroog Australian;
- UTC +9 lossis Is Nrias teb - Irkutsk, Kauslim thiab Nyiv;
- UTC +9: 30 suav nrog cov nroog hauv Central Australia;
- UTC +10 lossis Klio - Yakutsk, Guam, Melbourne thiab Sydney;
- UTC +10: 30 - tseem nyob hauv Australia;
- UTC +11 lossis Lima - Vladivostok, Solomon Islands thiab New Caledonia;
- UTC +11: 30 suav nrog Australian kob ntawm Norfolk;
- UTC +12 lossis Mike - New Zealand;
- UTC +12: 45 - qhov chaw uas zoo sib xws ntawm tib lub tebchaws xws li hauv UTC +12;
- UTC +13 - Samoa thiab Tonga;
- UTC +13: 45 khiav los hla New Zealand Chatham hauv ib lub pov txwv;
- UTC +14 - Line Islands.
Kauj ruam 2
Nyob rau tib lub sijhawm, muaj qee lub tebchaws ntawm lub ntiaj teb, ntawm thaj chaw uas muaj ntau lub sijhawm thaj chaw: Australia (los ntawm UTC +6: 30 txog +11: 30), Great Britain (los ntawm UTC +6 txog - 8), Brazil (los ntawm UTC -4 txog -2), Greenland (UTC 0 txog -4), Denmark (UTC +1 txog -4), Congo (UTC +1 txog +2), Indonesia (UTC +7 txog + 9), Spain, Kazakhstan (los ntawm UTC +5 txog +6), Canada (los ntawm UTC 3: 30 txog -8), Kiribati (los ntawm UTC +12 txog +14), Mexico (los ntawm UTC -6 txog -8), Micronesia (los ntawm UTC +10 txog +11), Mongolia (los ntawm UTC +7 txog +8), Netherlands (los ntawm UTC +1 txog -4), New Zealand (los ntawm UTC +12 txog +12: 45), Russia (los ntawm UTC +3 txog +12), Portugal, Tebchaws USA (UTC -5 txog -10), Fabkis (UTC +12 txog -10), Chile (UTC -4 txog -6) thiab Ecuador (UTC -5 txog -6).
