Every change of standard time since 1970

From 1970 to 2026 the 312 zones changed their standard time 459 times. The busiest year was 1991, with 57 changes; 1 of the 57 years had none at all. Seasonal clock changes are not counted here, only moves of the base offset itself.

Changes of standard time per year, 1970 to 2026

2026 6 changes

September 20 Morocco: UTC+1 to UTC+0
September 20 Western Sahara: UTC+1 to UTC+0
November 1 Edmonton, Canada: summer offset kept as standard time
November 1 Inuvik, Canada: summer offset kept as standard time
November 1 Vancouver, Canada: summer offset kept as standard time
November 1 Winnipeg, Canada: summer offset kept as standard time

2025 1 change

March 20 Coyhaique, Chile: summer offset kept as standard time

2024 4 changes

March 1 Almaty, Kazakhstan: UTC+6 to UTC+5
March 1 Qostanay, Kazakhstan: UTC+6 to UTC+5
March 31 Ittoqqortoormiit, Greenland: summer offset kept as standard time
October 15 Paraguay: summer offset kept as standard time

2023 3 changes

March 9 Casey Station, Antarctica: UTC+11 to UTC+8
March 25 Nuuk, Greenland: UTC−3 to UTC−2
December 18 Vostok Station, Antarctica: UTC+7 to UTC+5

2022 8 changes

March 13 Casey Station, Antarctica: UTC+11 to UTC+8
October 2 Casey Station, Antarctica: UTC+8 to UTC+11
October 28 Syria: summer offset kept as standard time
October 28 Jordan: summer offset kept as standard time
October 30 Chihuahua, Mexico: summer offset kept as standard time
October 30 Ciudad Juárez, Mexico: summer offset kept as standard time
October 30 Ojinaga, Mexico: summer offset kept as standard time
November 30 Ciudad Juárez, Mexico: UTC−6 to UTC−7

2021 3 changes

February 1 South Sudan: UTC+3 to UTC+2
March 14 Casey Station, Antarctica: UTC+11 to UTC+8
October 3 Casey Station, Antarctica: UTC+8 to UTC+11

2020 5 changes

March 8 Casey Station, Antarctica: UTC+11 to UTC+8
October 4 Casey Station, Antarctica: UTC+8 to UTC+11
November 1 Dawson, Canada: summer offset kept as standard time
November 1 Whitehorse, Canada: summer offset kept as standard time
December 27 Volgograd, Russia: UTC+4 to UTC+3

2019 4 changes

January 1 São Tomé and Príncipe: UTC+1 to UTC+0
January 20 Metlakatla, United States: UTC−8 to UTC−9
March 17 Casey Station, Antarctica: UTC+11 to UTC+8
October 4 Casey Station, Antarctica: UTC+8 to UTC+11

2018 10 changes

January 1 São Tomé and Príncipe: UTC+0 to UTC+1
March 11 Turks and Caicos Islands: summer offset kept as standard time
March 11 Casey Station, Antarctica: UTC+11 to UTC+8
May 4 North Korea: UTC+8:30 to UTC+9
October 7 Casey Station, Antarctica: UTC+8 to UTC+11
October 28 Volgograd, Russia: UTC+3 to UTC+4
October 28 Morocco: summer offset kept as standard time
October 28 Western Sahara: summer offset kept as standard time
November 4 Metlakatla, United States: summer offset kept as standard time
December 21 Qyzylorda, Kazakhstan: UTC+6 to UTC+5

2017 2 changes

October 29 Famagusta, Cyprus: UTC+3 to UTC+2
November 1 Sudan: UTC+3 to UTC+2

2016 15 changes

March 27 Astrakhan, Russia: UTC+3 to UTC+4
March 27 Barnaul, Russia: UTC+6 to UTC+7
March 27 Chita, Russia: UTC+8 to UTC+9
March 27 Sakhalin, Russia: UTC+10 to UTC+11
March 27 Ulyanovsk, Russia: UTC+3 to UTC+4
April 24 Magadan, Russia: UTC+10 to UTC+11
May 1 Venezuela: UTC−4:30 to UTC−4
May 29 Tomsk, Russia: UTC+6 to UTC+7
July 24 Novosibirsk, Russia: UTC+6 to UTC+7
September 7 Turkey: summer offset kept as standard time
September 8 Famagusta, Cyprus: summer offset kept as standard time
October 22 Casey Station, Antarctica: UTC+8 to UTC+11
December 4 Palmer Station, Antarctica: summer offset kept as standard time
December 4 Punta Arenas, Chile: summer offset kept as standard time
December 4 Saratov, Russia: UTC+3 to UTC+4

2015 6 changes

February 1 Cancún, Mexico: UTC−6 to UTC−5
March 8 Fort Nelson, Canada: UTC−8 to UTC−7
March 8 Turks and Caicos Islands: UTC−5 to UTC−4
August 15 North Korea: UTC+9 to UTC+8:30
October 4 Norfolk Island: UTC+11:30 to UTC+11
November 1 Metlakatla, United States: UTC−8 to UTC−9

2014 25 changes

March 30 Simferopol, Ukraine: UTC+2 to UTC+4
October 26 Astrakhan, Russia: UTC+4 to UTC+3
October 26 Barnaul, Russia: UTC+7 to UTC+6
October 26 Chita, Russia: UTC+10 to UTC+8
October 26 Irkutsk, Russia: UTC+9 to UTC+8
October 26 Kaliningrad, Russia: UTC+3 to UTC+2
October 26 Khandyga, Russia: UTC+10 to UTC+9
October 26 Kirov, Russia: UTC+4 to UTC+3
October 26 Krasnoyarsk, Russia: UTC+8 to UTC+7
October 26 Magadan, Russia: UTC+12 to UTC+10
October 26 Moscow, Russia: UTC+4 to UTC+3
October 26 Novosibirsk, Russia: UTC+7 to UTC+6
October 26 Omsk, Russia: UTC+7 to UTC+6
October 26 Sakhalin, Russia: UTC+11 to UTC+10
October 26 Saratov, Russia: UTC+4 to UTC+3
October 26 Simferopol, Ukraine: UTC+4 to UTC+3
October 26 Srednekolymsk, Russia: UTC+12 to UTC+11
October 26 Tomsk, Russia: UTC+7 to UTC+6
October 26 Ulyanovsk, Russia: UTC+4 to UTC+3
October 26 Ust-Nera, Russia: UTC+11 to UTC+10
October 26 Vladivostok, Russia: UTC+11 to UTC+10
October 26 Volgograd, Russia: UTC+4 to UTC+3
October 26 Yakutsk, Russia: UTC+10 to UTC+9
October 26 Yekaterinburg, Russia: UTC+6 to UTC+5
December 28 Bougainville, Papua New Guinea: UTC+10 to UTC+11

2013 3 changes

October 25 Libya: summer offset kept as standard time
November 10 Eirunepé, Brazil: UTC−4 to UTC−5
November 10 Rio Branco, Brazil: UTC−4 to UTC−5

2012 3 changes

February 22 Davis Station, Antarctica: UTC+5 to UTC+7
February 22 Casey Station, Antarctica: UTC+11 to UTC+8
November 10 Libya: UTC+2 to UTC+1

2011 33 changes

March 27 Anadyr, Russia: UTC+11 to UTC+12
March 27 Astrakhan, Russia: UTC+3 to UTC+4
March 27 Barnaul, Russia: UTC+6 to UTC+7
March 27 Chita, Russia: UTC+9 to UTC+10
March 27 Irkutsk, Russia: UTC+8 to UTC+9
March 27 Kaliningrad, Russia: UTC+2 to UTC+3
March 27 Kamchatka, Russia: UTC+11 to UTC+12
March 27 Khandyga, Russia: UTC+10 to UTC+11
March 27 Kirov, Russia: UTC+3 to UTC+4
March 27 Krasnoyarsk, Russia: UTC+7 to UTC+8
March 27 Magadan, Russia: UTC+11 to UTC+12
March 27 Belarus: UTC+2 to UTC+3
March 27 Moscow, Russia: UTC+3 to UTC+4
March 27 Novokuznetsk, Russia: UTC+6 to UTC+7
March 27 Novosibirsk, Russia: UTC+6 to UTC+7
March 27 Omsk, Russia: UTC+6 to UTC+7
March 27 Sakhalin, Russia: UTC+10 to UTC+11
March 27 Samara, Russia: UTC+3 to UTC+4
March 27 Saratov, Russia: UTC+3 to UTC+4
March 27 Srednekolymsk, Russia: UTC+11 to UTC+12
March 27 Tomsk, Russia: UTC+6 to UTC+7
March 27 Ulyanovsk, Russia: UTC+3 to UTC+4
March 27 Ust-Nera, Russia: UTC+11 to UTC+12
March 27 Vladivostok, Russia: UTC+10 to UTC+11
March 27 Volgograd, Russia: UTC+3 to UTC+4
March 27 Yakutsk, Russia: UTC+9 to UTC+10
March 27 Yekaterinburg, Russia: UTC+5 to UTC+6
September 13 Khandyga, Russia: UTC+11 to UTC+10
September 13 Ust-Nera, Russia: UTC+12 to UTC+11
October 28 Casey Station, Antarctica: UTC+8 to UTC+11
October 28 Davis Station, Antarctica: UTC+7 to UTC+5
December 30 Samoa: UTC−11 to UTC+13
December 30 Tokelau: UTC−11 to UTC+13

2010 9 changes

March 5 Casey Station, Antarctica: UTC+11 to UTC+8
March 11 Davis Station, Antarctica: UTC+5 to UTC+7
March 28 Anadyr, Russia: summer offset kept as standard time
March 28 Kamchatka, Russia: summer offset kept as standard time
March 28 Novokuznetsk, Russia: summer offset kept as standard time
March 28 Samara, Russia: summer offset kept as standard time
April 4 Bahía de Banderas, Mexico: UTC−7 to UTC−6
September 5 Falkland Islands: UTC−4 to UTC−3
November 7 Beulah, North Dakota, United States: summer offset kept as standard time

2009 4 changes

October 11 San Luis, Argentina: UTC−4 to UTC−3
October 18 Casey Station, Antarctica: UTC+8 to UTC+11
October 18 Davis Station, Antarctica: UTC+7 to UTC+5
October 18 Mawson Station, Antarctica: UTC+6 to UTC+5

2008 4 changes

January 21 San Luis, Argentina: UTC−3 to UTC−4
June 24 Eirunepé, Brazil: UTC−5 to UTC−4
June 24 Rio Branco, Brazil: UTC−5 to UTC−4
June 24 Santarém, Brazil: UTC−4 to UTC−3

2007 5 changes

March 11 Winamac, Indiana, United States: UTC−6 to UTC−5
March 11 Resolute, Canada: summer offset kept as standard time
November 4 Petersburg, Indiana, United States: summer offset kept as standard time
November 4 Vincennes, Indiana, United States: summer offset kept as standard time
December 9 Venezuela: UTC−4 to UTC−4:30

2006 7 changes

April 2 Knox, Indiana, United States: summer offset kept as standard time
April 2 Petersburg, Indiana, United States: summer offset kept as standard time
April 2 Tell City, Indiana, United States: summer offset kept as standard time
April 2 Vincennes, Indiana, United States: summer offset kept as standard time
April 2 Winamac, Indiana, United States: summer offset kept as standard time
April 15 Sri Lanka: UTC+6 to UTC+5:30
October 29 Resolute, Canada: summer offset kept as standard time

2005 2 changes

March 27 Georgia: UTC+3 to UTC+4
August 12 Kyrgyzstan: summer offset kept as standard time

2004 23 changes

January 1 Khandyga, Russia: UTC+9 to UTC+10
May 23 Mendoza, Argentina: UTC−3 to UTC−4
May 30 Ushuaia, Argentina: UTC−3 to UTC−4
May 31 San Juan, Argentina: UTC−3 to UTC−4
May 31 San Luis, Argentina: UTC−3 to UTC−4
June 1 Catamarca, Argentina: UTC−3 to UTC−4
June 1 La Rioja, Argentina: UTC−3 to UTC−4
June 1 Rio Gallegos, Argentina: UTC−3 to UTC−4
June 1 Tucumán, Argentina: UTC−3 to UTC−4
June 13 Tucumán, Argentina: UTC−4 to UTC−3
June 20 Catamarca, Argentina: UTC−4 to UTC−3
June 20 La Rioja, Argentina: UTC−4 to UTC−3
June 20 Rio Gallegos, Argentina: UTC−4 to UTC−3
June 20 Ushuaia, Argentina: UTC−4 to UTC−3
June 27 Georgia: UTC+4 to UTC+3
July 25 San Juan, Argentina: UTC−4 to UTC−3
July 25 San Luis, Argentina: UTC−4 to UTC−3
September 26 Mendoza, Argentina: UTC−4 to UTC−3
October 31 Aqtau, Kazakhstan: summer offset kept as standard time
October 31 Atyrau, Kazakhstan: summer offset kept as standard time
October 31 Oral, Kazakhstan: summer offset kept as standard time
October 31 Qostanay, Kazakhstan: summer offset kept as standard time
October 31 Qyzylorda, Kazakhstan: summer offset kept as standard time

2003 1 change

October 26 New Salem, North Dakota, United States: summer offset kept as standard time

2002 1 change

May 1 Tomsk, Russia: UTC+7 to UTC+6

2001 3 changes

April 1 Cambridge Bay, Canada: summer offset kept as standard time
April 1 Rankin Inlet, Canada: summer offset kept as standard time
April 1 Resolute, Canada: summer offset kept as standard time

2000 23 changes

January 15 South Sudan: UTC+2 to UTC+3
January 15 Sudan: UTC+2 to UTC+3
March 3 Buenos Aires, Argentina: summer offset kept as standard time
March 3 Catamarca, Argentina: summer offset kept as standard time
March 3 Cordoba, Argentina: summer offset kept as standard time
March 3 Jujuy, Argentina: summer offset kept as standard time
March 3 La Rioja, Argentina: summer offset kept as standard time
March 3 Mendoza, Argentina: summer offset kept as standard time
March 3 Rio Gallegos, Argentina: summer offset kept as standard time
March 3 Salta, Argentina: summer offset kept as standard time
March 3 San Juan, Argentina: summer offset kept as standard time
March 3 San Luis, Argentina: summer offset kept as standard time
March 3 Tucumán, Argentina: summer offset kept as standard time
March 3 Ushuaia, Argentina: summer offset kept as standard time
September 17 East Timor: UTC+8 to UTC+9
October 29 Cambridge Bay, Canada: summer offset kept as standard time
October 29 Iqaluit, Canada: summer offset kept as standard time
October 29 Monticello, Kentucky, United States: summer offset kept as standard time
October 29 Rankin Inlet, Canada: summer offset kept as standard time
October 29 Resolute, Canada: summer offset kept as standard time
October 29 Dominican Republic: UTC−4 to UTC−5
November 5 Cambridge Bay, Canada: UTC−5 to UTC−6
December 3 Dominican Republic: UTC−5 to UTC−4

1999 17 changes

January 1 Micronesia: UTC+12 to UTC+11
March 28 Atyrau, Kazakhstan: summer offset kept as standard time
October 3 Buenos Aires, Argentina: summer offset kept as standard time
October 3 Catamarca, Argentina: summer offset kept as standard time
October 3 Cordoba, Argentina: summer offset kept as standard time
October 3 Jujuy, Argentina: summer offset kept as standard time
October 3 La Rioja, Argentina: summer offset kept as standard time
October 3 Mendoza, Argentina: summer offset kept as standard time
October 3 Rio Gallegos, Argentina: summer offset kept as standard time
October 3 Salta, Argentina: summer offset kept as standard time
October 3 San Juan, Argentina: summer offset kept as standard time
October 3 San Luis, Argentina: summer offset kept as standard time
October 3 Tucumán, Argentina: summer offset kept as standard time
October 3 Ushuaia, Argentina: summer offset kept as standard time
October 31 Cambridge Bay, Canada: summer offset kept as standard time
October 31 Iqaluit, Canada: UTC−5 to UTC−6
October 31 Lithuania: summer offset kept as standard time

1998 6 changes

March 29 Lithuania: summer offset kept as standard time
April 5 Chihuahua, Mexico: summer offset kept as standard time
April 5 Ciudad Juárez, Mexico: summer offset kept as standard time
April 5 Ojinaga, Mexico: summer offset kept as standard time
April 27 Pitcairn Islands: UTC−8:30 to UTC−8
August 2 Cancún, Mexico: UTC−5 to UTC−6

1997 5 changes

January 1 Nicaragua: UTC−5 to UTC−6
March 30 Sakhalin, Russia: summer offset kept as standard time
March 30 Simferopol, Ukraine: summer offset kept as standard time
October 4 Libya: summer offset kept as standard time
October 26 Cancún, Mexico: summer offset kept as standard time

1996 6 changes

January 1 British Indian Ocean Territory: UTC+5 to UTC+6
January 1 Danmarkshavn, Greenland: UTC−3 to UTC+0
March 31 Lisbon, Portugal: summer offset kept as standard time
May 25 Sri Lanka: UTC+5:30 to UTC+6:30
September 30 Libya: UTC+2 to UTC+1
October 26 Sri Lanka: UTC+6:30 to UTC+6

1995 2 changes

May 28 Barnaul, Russia: UTC+7 to UTC+6
September 24 Armenia: summer offset kept as standard time

1994 7 changes

February 1 Vostok Station, Antarctica: UTC+7 to UTC+0
May 1 Simferopol, Ukraine: UTC+2 to UTC+3
September 25 Georgia: summer offset kept as standard time
September 25 Aqtau, Kazakhstan: UTC+5 to UTC+4
November 1 Vostok Station, Antarctica: UTC+0 to UTC+7
December 31 Kanton Island, Kiribati: UTC−11 to UTC+13
December 31 Kiritimati, Kiribati: UTC−10 to UTC+14

1993 4 changes

January 1 Nicaragua: UTC−6 to UTC−5
May 23 Novosibirsk, Russia: UTC+7 to UTC+6
June 17 Azores, Portugal: UTC+0 to UTC−1
August 21 Marshall Islands: UTC−12 to UTC+12

1992 42 changes

January 1 Nicaragua: UTC−6 to UTC−5
January 19 Almaty, Kazakhstan: UTC+5 to UTC+6
January 19 Anadyr, Russia: UTC+11 to UTC+12
January 19 Aqtau, Kazakhstan: UTC+4 to UTC+5
January 19 Aqtobe, Kazakhstan: UTC+4 to UTC+5
January 19 Turkmenistan: UTC+4 to UTC+5
January 19 Atyrau, Kazakhstan: UTC+4 to UTC+5
January 19 Barnaul, Russia: UTC+6 to UTC+7
January 19 Chita, Russia: UTC+8 to UTC+9
January 19 Irkutsk, Russia: UTC+7 to UTC+8
January 19 Kamchatka, Russia: UTC+11 to UTC+12
January 19 Khandyga, Russia: UTC+8 to UTC+9
January 19 Krasnoyarsk, Russia: UTC+6 to UTC+7
January 19 Magadan, Russia: UTC+10 to UTC+11
January 19 Moscow, Russia: UTC+2 to UTC+3
January 19 Novokuznetsk, Russia: UTC+6 to UTC+7
January 19 Novosibirsk, Russia: UTC+6 to UTC+7
January 19 Omsk, Russia: UTC+5 to UTC+6
January 19 Oral, Kazakhstan: UTC+4 to UTC+5
January 19 Qostanay, Kazakhstan: UTC+4 to UTC+5
January 19 Qyzylorda, Kazakhstan: UTC+5 to UTC+6
January 19 Sakhalin, Russia: UTC+10 to UTC+11
January 19 Srednekolymsk, Russia: UTC+10 to UTC+11
January 19 Tomsk, Russia: UTC+6 to UTC+7
January 19 Ulyanovsk, Russia: UTC+2 to UTC+3
January 19 Ust-Nera, Russia: UTC+10 to UTC+11
January 19 Vladivostok, Russia: UTC+9 to UTC+10
January 19 Yakutsk, Russia: UTC+8 to UTC+9
January 19 Yekaterinburg, Russia: UTC+4 to UTC+5
March 29 Guyana: UTC−3 to UTC−4
March 29 Astrakhan, Russia: summer offset kept as standard time
March 29 Kirov, Russia: summer offset kept as standard time
March 29 Oral, Kazakhstan: summer offset kept as standard time
March 29 Qyzylorda, Kazakhstan: summer offset kept as standard time
March 29 Saratov, Russia: summer offset kept as standard time
March 29 Volgograd, Russia: summer offset kept as standard time
September 24 Nicaragua: UTC−5 to UTC−6
September 27 Lisbon, Portugal: summer offset kept as standard time
September 27 Azerbaijan: summer offset kept as standard time
October 18 Mendoza, Argentina: UTC−4 to UTC−3
October 25 Center, North Dakota, United States: summer offset kept as standard time
December 27 Azores, Portugal: UTC−1 to UTC+0

1991 57 changes

March 1 La Rioja, Argentina: UTC−3 to UTC−4
March 1 San Juan, Argentina: UTC−3 to UTC−4
March 3 Catamarca, Argentina: UTC−3 to UTC−4
March 3 Cordoba, Argentina: UTC−3 to UTC−4
March 3 Salta, Argentina: UTC−3 to UTC−4
March 3 Tucumán, Argentina: UTC−3 to UTC−4
March 31 Almaty, Kazakhstan: summer offset kept as standard time
March 31 Anadyr, Russia: summer offset kept as standard time
March 31 Aqtau, Kazakhstan: summer offset kept as standard time
March 31 Aqtobe, Kazakhstan: summer offset kept as standard time
March 31 Turkmenistan: summer offset kept as standard time
March 31 Astrakhan, Russia: UTC+3 to UTC+4
March 31 Atyrau, Kazakhstan: summer offset kept as standard time
March 31 Azerbaijan: summer offset kept as standard time
March 31 Barnaul, Russia: summer offset kept as standard time
March 31 Kyrgyzstan: summer offset kept as standard time
March 31 Chita, Russia: summer offset kept as standard time
March 31 Tajikistan: summer offset kept as standard time
March 31 Irkutsk, Russia: summer offset kept as standard time
March 31 Kamchatka, Russia: summer offset kept as standard time
March 31 Khandyga, Russia: summer offset kept as standard time
March 31 Kirov, Russia: UTC+3 to UTC+4
March 31 Krasnoyarsk, Russia: summer offset kept as standard time
March 31 Magadan, Russia: summer offset kept as standard time
March 31 Belarus: summer offset kept as standard time
March 31 Moscow, Russia: summer offset kept as standard time
March 31 Novokuznetsk, Russia: summer offset kept as standard time
March 31 Novosibirsk, Russia: summer offset kept as standard time
March 31 Omsk, Russia: summer offset kept as standard time
March 31 Qostanay, Kazakhstan: summer offset kept as standard time
March 31 Qyzylorda, Kazakhstan: summer offset kept as standard time
March 31 Sakhalin, Russia: summer offset kept as standard time
March 31 Samara, Russia: summer offset kept as standard time
March 31 Saratov, Russia: UTC+3 to UTC+4
March 31 Srednekolymsk, Russia: summer offset kept as standard time
March 31 Tashkent, Uzbekistan: summer offset kept as standard time
March 31 Georgia: summer offset kept as standard time
March 31 Tomsk, Russia: summer offset kept as standard time
March 31 Ulyanovsk, Russia: summer offset kept as standard time
March 31 Ust-Nera, Russia: summer offset kept as standard time
March 31 Vladivostok, Russia: summer offset kept as standard time
March 31 Volgograd, Russia: UTC+3 to UTC+4
March 31 Yakutsk, Russia: summer offset kept as standard time
March 31 Yekaterinburg, Russia: summer offset kept as standard time
March 31 Armenia: summer offset kept as standard time
May 7 La Rioja, Argentina: UTC−4 to UTC−3
May 7 San Juan, Argentina: UTC−4 to UTC−3
June 1 San Luis, Argentina: UTC−4 to UTC−3
September 29 Qyzylorda, Kazakhstan: summer offset kept as standard time
September 29 Samara, Russia: summer offset kept as standard time
October 6 Jujuy, Argentina: UTC−4 to UTC−3
October 20 Catamarca, Argentina: UTC−4 to UTC−3
October 20 Cordoba, Argentina: UTC−4 to UTC−3
October 20 Salta, Argentina: UTC−4 to UTC−3
October 20 Tucumán, Argentina: UTC−4 to UTC−3
October 20 Samara, Russia: UTC+3 to UTC+4
October 27 Knox, Indiana, United States: summer offset kept as standard time

1990 7 changes

March 4 Jujuy, Argentina: UTC−3 to UTC−4
March 4 Mendoza, Argentina: UTC−3 to UTC−4
March 14 San Luis, Argentina: UTC−3 to UTC−4
May 4 Libya: UTC+1 to UTC+2
May 6 Moldova: UTC+3 to UTC+2
July 1 Kyiv, Ukraine: UTC+3 to UTC+2
July 1 Simferopol, Ukraine: UTC+3 to UTC+2

1989 9 changes

March 26 Astrakhan, Russia: summer offset kept as standard time
March 26 Kaliningrad, Russia: summer offset kept as standard time
March 26 Kirov, Russia: summer offset kept as standard time
March 26 Oral, Kazakhstan: summer offset kept as standard time
March 26 Latvia: summer offset kept as standard time
March 26 Samara, Russia: summer offset kept as standard time
March 26 Estonia: summer offset kept as standard time
March 26 Ulyanovsk, Russia: summer offset kept as standard time
March 26 Lithuania: summer offset kept as standard time

1988 3 changes

January 1 Pontianak, Indonesia: UTC+8 to UTC+7
March 27 Saratov, Russia: summer offset kept as standard time
March 27 Volgograd, Russia: summer offset kept as standard time

1987 1 change

October 1 Bhutan: UTC+5:30 to UTC+6

1986 3 changes

January 1 Morocco: UTC+1 to UTC+0
January 1 Galápagos Islands, Ecuador: UTC−5 to UTC−6
January 1 Nepal: UTC+5:30 to UTC+5:45

1985 1 change

September 15 Falkland Islands: summer offset kept as standard time

1984 4 changes

March 16 Morocco: UTC+0 to UTC+1
March 16 Ceuta, Spain: UTC+0 to UTC+1
October 1 Suriname: UTC−3:30 to UTC−3
November 1 Turkey: UTC+3 to UTC+2

1983 7 changes

January 4 Cancún, Mexico: UTC−5 to UTC−6
May 1 Falkland Islands: UTC−4 to UTC−3
October 30 Adak, United States: summer offset kept as standard time
October 30 Anchorage, United States: summer offset kept as standard time
October 30 Juneau, United States: UTC−8 to UTC−9
October 30 Nome, United States: UTC−11 to UTC−9
October 30 Sitka, United States: UTC−8 to UTC−9

1982 12 changes

January 1 Libya: UTC+2 to UTC+1
March 13 Easter Island, Chile: summer offset kept as standard time
April 1 Anadyr, Russia: summer offset kept as standard time
April 1 Aqtau, Kazakhstan: summer offset kept as standard time
April 1 Aqtobe, Kazakhstan: summer offset kept as standard time
April 1 Atyrau, Kazakhstan: summer offset kept as standard time
April 1 Oral, Kazakhstan: summer offset kept as standard time
April 1 Qostanay, Kazakhstan: summer offset kept as standard time
April 1 Qyzylorda, Kazakhstan: summer offset kept as standard time
April 1 Samarkand, Uzbekistan: summer offset kept as standard time
May 1 Palmer Station, Antarctica: UTC−3 to UTC−4
November 2 Mérida, Mexico: UTC−5 to UTC−6

1981 14 changes

March 1 Lord Howe Island, Australia: UTC+10 to UTC+10:30
March 29 Ittoqqortoormiit, Greenland: UTC−2 to UTC−1
April 1 Ust-Nera, Russia: UTC+9 to UTC+11
May 1 Algeria: UTC+0 to UTC+1
October 1 Aqtau, Kazakhstan: UTC+5 to UTC+6
October 1 Aqtobe, Kazakhstan: summer offset kept as standard time
October 1 Atyrau, Kazakhstan: UTC+5 to UTC+6
October 1 Oral, Kazakhstan: summer offset kept as standard time
October 1 Qostanay, Kazakhstan: summer offset kept as standard time
October 1 Qyzylorda, Kazakhstan: summer offset kept as standard time
October 1 Samarkand, Uzbekistan: summer offset kept as standard time
December 26 Cancún, Mexico: UTC−6 to UTC−5
December 26 Mérida, Mexico: UTC−6 to UTC−5
December 31 Singapore: UTC+7:30 to UTC+8

1980 3 changes

April 27 Juneau, United States: summer offset kept as standard time
May 1 Saint Pierre and Miquelon: UTC−4 to UTC−3
October 26 Juneau, United States: summer offset kept as standard time

1979 5 changes

February 10 Nauru: UTC+11:30 to UTC+12
April 29 Inuvik, Canada: UTC−8 to UTC−7
October 1 Kanton Island, Kiribati: UTC−12 to UTC−11
October 1 Kiritimati, Kiribati: UTC−10:40 to UTC−10
October 26 Algeria: UTC+1 to UTC+0

1978 5 changes

January 1 Hovd, Mongolia: UTC+6 to UTC+7
January 1 Ulaanbaatar, Mongolia: UTC+7 to UTC+8
June 29 Turkey: summer offset kept as standard time
November 11 Iran: UTC+4 to UTC+3:30
November 12 Cook Islands: UTC−10:30 to UTC−10

1977 3 changes

October 21 Algeria: summer offset kept as standard time
October 21 Iran: UTC+3:30 to UTC+4
October 30 Petersburg, Indiana, United States: summer offset kept as standard time

1976 3 changes

April 14 Western Sahara: UTC−1 to UTC+0
May 3 East Timor: UTC+9 to UTC+8
September 26 Lisbon, Portugal: UTC+1 to UTC+0

1975 5 changes

January 1 Guinea-Bissau: UTC−1 to UTC+0
February 16 Nicaragua: UTC−5 to UTC−6
June 13 Vietnam: UTC+8 to UTC+7
August 1 Guyana: UTC−3:45 to UTC−3
November 25 Cape Verde: UTC−2 to UTC−1

1974 6 changes

January 6 Louisville, Kentucky, United States: summer offset kept as standard time
January 6 Marengo, Indiana, United States: summer offset kept as standard time
April 1 Paraguay: UTC−3 to UTC−4
October 27 Dominican Republic: UTC−5 to UTC−4
October 27 Louisville, Kentucky, United States: summer offset kept as standard time
October 27 Marengo, Indiana, United States: summer offset kept as standard time

1973 3 changes

April 29 Menominee, United States: summer offset kept as standard time
May 1 Nicaragua: UTC−6 to UTC−5
October 28 Dawson, Canada: UTC−9 to UTC−8

1972 5 changes

January 7 Liberia: UTC−0:44:30 to UTC+0
April 30 Swift Current, Canada: UTC−7 to UTC−6
June 1 Qatar: UTC+4 to UTC+3
August 30 Dawson Creek, Canada: summer offset kept as standard time
October 1 Paraguay: UTC−4 to UTC−3

1971 1 change

October 31 United Kingdom: UTC+1 to UTC+0

More context: how often time zones change.