What is the difference between every time zone?

Answer 1

UTC-11 & UTC-12 -- Niue Time (NUT) & American Samoa Standard Time (SST) are 1 hour ahead of Baker Island Time (BIT).

UTC-10 -- Cook Islands Time (CKT), Hawaii-Aleutian Standard Time (HAST) & Tahiti Time (TAHT) are 1 hour ahead of NUT & SST.

UTC-9:30 -- Marquesas Time (MART) is 1/2 hour ahead of CKT, HAST & TAHT.

UTC-9 -- Alaska Standard Time (AKST), Gambier Time (GAMT) & Hawaii-Aleutian Daylight Saving Time (HADT) are 1/2 hour ahead of MART.

UTC-8 -- Pacific Standard Time (PST), Pitcairn Standard Time (PST) & Alaska Daylight Saving Time (AKDT) are 1 hour ahead of AKST, GAMT & HADT.

UTC-7 -- Mountain Standard Time (MST) & Pacific Daylight Saving Time (PDT) are 1 hour ahead of PST & AKDT.

UTC-6 -- Central Standard Time (CST), Galapagos Island Time (GALT) & Mountain Daylight Saving Time (MDT) are 1 hour ahead of MST & PDT.

UTC-5 -- Acre Time (ACT), Colombia Time (COT), Cuba Standard Time (CUST), Easter Island Summer Time (EASST), Ecuador Time (ECT), Eastern Standard Time (EST), Peru Time (PET) & Central Daylight Saving Time (CDT) are 1 hour ahead of CST, GALT & MDT.

UTC-4:30 -- Venezuela Time (VET) is 1/2 hour ahead of ACT, COT, CUST, EASST, ECT, EST, PET & CDT.

UTC-4 -- Amazon Time (ANT), Atlantic Standard Time (AST), Bolivia Time (BOT), Guyana Time (GYT), Paraguay Time (PYT), Cuba Daylight Saving Time (CUDT) & Eastern Daylight Saving Time (EDT) are 1/2 hour ahead of VET.

UTC-3:30 -- Newfoundland Standard Time (NST) is 1/2 hour ahead of ANT, AST, BOT, GYT, PYT, CUDT & EDT.

UTC-3 -- Argentina Time (ART), Brasilia Time (BRT), Chile Summer Time (CLST), Falkland Islands Summer Time (FKST), French Guiana Time (GFT), St. Pierre & Miquelon Standard Time (PMST), Rothera Time (ROTT), Suriname Time (SRT), Uruguay Time (UYT), Western Greenland Time (WGT), Atlantic Daylight Saving Time (ADT), Amazon Summer Time (ANST) & Paraguay Summer Time (PYST) are 1/2 hour ahead of NST.

UTC-2:30 -- Newfoundland Daylight Saving Time (NDT) is 1/2 hour ahead of ART, BRT, CLST, FKST, GFT, PMST, ROTT, SRT, UYT, WGT, ADT, ANST & PYST.

UTC-2 -- Fernando de Noronha Time (FNT), South Georgia & the South Sandwich Islands Time (GST), Brasilia Summer Time (BRST), St. Pierre & Miquelon Daylight Saving Time (PMDT), Uruguay Summer Time (UYST) & Western Greenland Summer Time (WGST) are 1/2 hour ahead of NDT.

UTC-1 -- Azores Time (AZOT), Cabo Verde Time (CVT) & Eastern Greenland Time (EGT) are 1 hour ahead of FNT, GST, BRST, PMDT, UYST & WGST.

UTC -- Greenwich Mean Time (GMT), Western European Time (WET), Azores Summer Time (AZOST) & Eastern Greenland Summer Time (EGST) are 1 hour ahead of AZOT, CVT & EGT.

UTC+1 -- Central European Time (CET), West Africa Time (WAT), British Summer Time (BST), Irish Summer Time (IEST) & Western European Summer Time (WEST) are 1 hour ahead of GMT, WET, AZOST & EGST.

UTC+2 -- Central Africa Time (CAT), Eastern European Time (EET), Israel Standard Time (ILST), South Africa Standard Time (SAST), Central European Summer Time (CEST) & West Africa Summer Time (WAST) are 1 hour ahead of CET, WAT, BST, IEST & WEST.

UTC+3 -- Arabia Standard Time (AAST), Belarus Time (BYT), East Africa Time (EAT), Moscow Time (MSK), Syowa Time (SYOT), Eastern European Summer Time (EEST) & Israel Daylight Saving Time (ILDT) are 1 hour ahead of CAT, EET, ILST, SAST, CEST & WAST.

UTC+3:30 -- Iran Standard Time (IRST) is 1/2 hour ahead of AAST, BYT, EAT, MSK, SYOT, EEST & ILDT.

UTC+4 -- Armenia Time (AMT), Azerbaijan Time (AZT), Georgia Time (GET), Gulf Standard Time (GUST), Mauritius Time (MUT), Reunion Time (RET), Samara Time (SAMT) & Seychelles Time (SCT) are 1/2 hour ahead of IRST.

UTC+4:30 -- Afghanistan Time (AFT) & Iran Daylight Saving Time (IRDT) are 1/2 hour ahead of AMT, AZT, GET, GUST, MUT, RET, SAMT & SCT.

UTC+5 -- Aqtobe Time & Aqtau Time (AQTT), Mawson Time (MAWT), Maldives Time (MVT), Oral Time (ORAT), Pakistan Time (PKT), French Southern & Antarctic Time (TFT), Tajikistan Time (TJT), Turkmenistan Time (TMT), Uzbekistan Time (UZT), Yekaterinburg Time (YEKT) & Azerbaijan Summer Time (AZST) are 1/2 hour ahead of AFT & IRDT.

UTC+5:30 -- Indian Standard Time (INST) is 1/2 hour ahead of AQTT, MAWT, MVT, ORAT, PKT, TFT, TJT, TMT, UZT, YEKT & AZST.

UTC+5:45 -- Nepal Time (NPT) is 1/4 hour ahead of INST.

UTC+6 -- Almaty Time (ALMT), Bangladesh Standard Time (BdST), Bhutan Time (BTT), B.I.O.T. Time (IOT), Kyrgyzstan Time (KGT), Novosibirsk Time (NOVT), Omsk Time (OMST), Qyzylorda Time (QYZT) & Vostok Time (VOST) are 1/4 hour ahead of NPT.

UTC+6:30 -- Cocos Islands Time (CCT) & Myanmar Time (MMT) are 1/2 hour ahead of ALMT, BdST, BTT, IOT, KGT, NOVT, OMST, QYZT & VOST.

UTC+7 -- Christmas Island Time (CXT), Davis Time (DAVT), Hovd Time (HOVT), Indochina Time (ICT), Krasnoyarsk Time (KRAT) & Western Indonesian Time (WIB) are 1/2 hour ahead of CCT & MMT.

UTC+8 -- Australian Western Standard Time (AWST), Brunei Darussalam Time (BNT), Chiobalsan Time (CHOT), China Standard Time (CNST), Hong Kong Time (HKT), Irkutsk Time (IRKT), Malaysia Time (MYT), Philippines Time (PHT), Singapore Time (SGT), Ulaanbaatar Time (ULAT), Central Indonesian Time (WITA) & Hovd Summer Time (HOVST) are 1 hour ahead of CXT, DAVT, HOVT, ICT, KRAT & WIB.

UTC+8:45 -- Central Western Standard Time (CWST) is 3/4 hour ahead of AWST, BNT, CHOT, CNST, HKT, IRKT, MYT, PHT, SGT, ULAT, WITA & HOVST.

UTC+9 -- Japan Standard Time (JST), Korea Standard Time (KST), Palau Time (PWT), Timor-Leste Time (TLT), Eastern Indonesian Time (WIT), Yakutsk Time (YAKT) & Ulaanbaatar Summer Time (ULAST) are 1/4 hour ahead of CWST.

UTC+9:30 -- Australian Central Standard Time (ACST) is 1/2 hour ahead of JST, KST, PWT, TLT, WIT, YAKT & ULAST.

UTC+10 -- Australian Eastern Standard Time (AEST), Chamorro Standard Time (ChST), Chuuk Time (CHUT), Dumont-d'Urville Time (DDUT), Magadan Time (MAGT), Papua New Guinea Time (PGT), Sakhalin Time (SAKT), Vladivostok Time (VLAT) & Yap Time (YAPT) are 1/2 hour ahead of ACST.

UTC+10:30 -- Lord Howe Standard Time (LHST) & Australian Central Daylight Saving Time (ACDT) are 1/2 hour ahead of AEST, ChST, CHUT, DDUT, MAGT, PGT, SAKT, VLAT & YAPT.

UTC+11 -- Bougainville Standard Time (BOUST), Kosrae Time (KOST), Macquarie Island Time (MIST), New Caledonia Time (NCT), Pohnpei Time (PONT), Solomon Islands Time (SBT), Srednekolymsk Time (SRET), Vanuatu Time (VUT), Australian Eastern Daylight Saving Time (AEDT) & Lord Howe Daylight Saving Time (LHDT) are 1/2 hour ahead of LHST & ACDT.

UTC+11:30 -- Norfolk Time (NFT) is 1/2 hour ahead of BOUST, KOST, MIST, NCT, PONT, SBT, SRET, VUT, AEDT & LHDT.

UTC+12 -- Anadyr Time (ANAT), Fiji Time (FJT), Gilbert Islands Time (GILT), Marshall Islands Time (MHT), Nauru Time (NRT), New Zealand Standard Time (NZST), Petropavlovsk-Kamchatski Time (PETT), Tuvalu Time (TVT), Wake Time (WAKT) & Wallis and Futuna Time (WFT) are 1/2 hour ahead of NFT.

UTC+12:45 -- Chatham Standard Time (CHAST) is 3/4 hour ahead of ANAT, FJT, GILT, MHT, NRT, NZST, PETT, TVT, WAKT & WFT.

UTC+13 -- Phoenix Islands Time (PHOT), Tokelau Time (TKT), Tonga Time (TOT), Samoa Standard Time (WSST), Fiji Summer Time (FJST) & New Zealand Daylight Saving Time (NZDT) are 1/4 hour ahead of CHAST.

UTC+13:45 -- Chatham Daylight Saving Time (CHADT) is 3/4 hour ahead of PHOT, TKT, TOT, WSST, FJST & NZDT.

UTC+14 -- Line Islands Time (LINT) & Samoa Daylight Saving Time (WSDT) are 1/4 hour ahead of CHADT.

Answer 2

Among the 50 states and 5 overseas territories of the United States, there are 9 different time offsets. Among just the 50 states, there are 7 different time offsets during Daylight Saving Time and 6 during Standard Time. There are 4 different time offsets in the middle of any given day among just the 48 contiguous states of the U.S.

These are the time differences between pairs of time zones among the 48 contiguous U.S. states:

0: PDT to MST (e.g. California to Phoenix in July)

1 hr.: PST to MST (e.g. California to Colorado in January)

1 hr.: PDT to MDT (e.g. California to Colorado in July)

1 hr.: MST to MDT (e.g. Phoenix to Colorado in July)

1 hr.: MST to CST (e.g. Colorado to Illinois in January)

1 hr.: MDT to CDT (e.g. Colorado to Illinois in July)

1 hr.: CST to EST (e.g. Illinois to New York in January)

1 hr.: CDT to EDT (e.g. Illinois to New York in July)

2 hrs.: PST to CST (e.g. California to Illinois in January)

2 hrs.: PDT to CDT (e.g. California to Illinois in July)

2 hrs.: MST to CDT (e.g. Phoenix to Illinois in July)

2 hrs.: MST to EST (e.g. Colorado to New York in January)

2 hrs.: MDT to EDT (e.g. Colorado to New York in July)

3 hrs.: PST to EST (e.g. California to New York in January)

3 hrs.: PDT to EDT (e.g. California to New York in July)

3 hrs.: MST to EDT (e.g. Phoenix to New York in July)

PST = UTC - 8 hrs. (Pacific Standard Time)

PDT = UTC - 7 hrs. (Pacific Daylight Saving Time)

MST = UTC - 7 hrs. (Mountain Standard Time)

MDT = UTC - 6 hrs. (Mountain Daylight Saving Time)

CST = UTC - 6 hrs. (Central Standard Time)

CDT = UTC - 5 hrs. (Central Daylight Saving Time)

EST = UTC - 5 hrs. (Eastern Standard Time)

EDT = UTC - 4 hrs. (Eastern Daylight Saving Time)