Time Zone Changes in 1973
In 1973, 251 time zone transitions occurred across 127 regions worldwide. Clocks moved forward in 130 transitions (gaps) and turned back in 120 transitions (overlaps).
Advertisement Space
Transitions in 1973 (251)
| Zone | Instant (UTC) | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|---|
| America/Santo_Domingo | 1973-01-21T04:30:00Z | 1973-01-20 23:30:00 | -04:30 → -05:00 | EST | No | overlap |
| Antarctica/Macquarie | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/ACT | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Canberra | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Currie | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Hobart | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Melbourne | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/NSW | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Sydney | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Tasmania | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Victoria | 1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
| Australia/Adelaide | 1973-03-03T16:30:00Z | 1973-03-04 02:00:00 | +10:30 → +09:30 | ACST | No | overlap |
| Australia/Broken_Hill | 1973-03-03T16:30:00Z | 1973-03-04 02:00:00 | +10:30 → +09:30 | ACST | No | overlap |
| Australia/South | 1973-03-03T16:30:00Z | 1973-03-04 02:00:00 | +10:30 → +09:30 | ACST | No | overlap |
| Australia/Yancowinna | 1973-03-03T16:30:00Z | 1973-03-04 02:00:00 | +10:30 → +09:30 | ACST | No | overlap |
| America/Coyhaique | 1973-03-11T03:00:00Z | 1973-03-10 23:00:00 | -03:00 → -04:00 | -04 | No | overlap |
| America/Punta_Arenas | 1973-03-11T03:00:00Z | 1973-03-10 23:00:00 | -03:00 → -04:00 | -04 | No | overlap |
| America/Santiago | 1973-03-11T03:00:00Z | 1973-03-10 23:00:00 | -03:00 → -04:00 | -04 | No | overlap |
| Chile/Continental | 1973-03-11T03:00:00Z | 1973-03-10 23:00:00 | -03:00 → -04:00 | -04 | No | overlap |
| Chile/EasterIsland | 1973-03-11T03:00:00Z | 1973-03-10 20:00:00 | -06:00 → -07:00 | -07 | No | overlap |
| Pacific/Easter | 1973-03-11T03:00:00Z | 1973-03-10 20:00:00 | -06:00 → -07:00 | -07 | No | overlap |
| Eire | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | IST | No | gap |
| Europe/Belfast | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Dublin | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | IST | No | gap |
| Europe/Guernsey | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Isle_of_Man | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Jersey | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/London | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| GB | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| GB-Eire | 1973-03-18T02:00:00Z | 1973-03-18 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Malta | 1973-03-30T23:00:00Z | 1973-03-31 01:00:00 | +01:00 → +02:00 | CEST | Yes | gap |
| Asia/Hong_Kong | 1973-04-21T19:30:00Z | 1973-04-22 04:30:00 | +08:00 → +09:00 | HKST | Yes | gap |
| Asia/Macao | 1973-04-21T19:30:00Z | 1973-04-22 04:30:00 | +08:00 → +09:00 | CDT | Yes | gap |
| Asia/Macau | 1973-04-21T19:30:00Z | 1973-04-22 04:30:00 | +08:00 → +09:00 | CDT | Yes | gap |
| Hongkong | 1973-04-21T19:30:00Z | 1973-04-22 04:30:00 | +08:00 → +09:00 | HKST | Yes | gap |
| Africa/Juba | 1973-04-28T22:00:00Z | 1973-04-29 01:00:00 | +02:00 → +03:00 | CAST | Yes | gap |
| Africa/Khartoum | 1973-04-28T22:00:00Z | 1973-04-29 01:00:00 | +02:00 → +03:00 | CAST | Yes | gap |
| America/Havana | 1973-04-29T05:00:00Z | 1973-04-29 01:00:00 | -05:00 → -04:00 | CDT | Yes | gap |
| Cuba | 1973-04-29T05:00:00Z | 1973-04-29 01:00:00 | -05:00 → -04:00 | CDT | Yes | gap |
| America/St_Johns | 1973-04-29T05:30:00Z | 1973-04-29 03:00:00 | -03:30 → -02:30 | NDT | Yes | gap |
| Canada/Newfoundland | 1973-04-29T05:30:00Z | 1973-04-29 03:00:00 | -03:30 → -02:30 | NDT | Yes | gap |
| America/Glace_Bay | 1973-04-29T06:00:00Z | 1973-04-29 03:00:00 | -04:00 → -03:00 | ADT | Yes | gap |
| America/Goose_Bay | 1973-04-29T06:00:00Z | 1973-04-29 03:00:00 | -04:00 → -03:00 | ADT | Yes | gap |
| America/Halifax | 1973-04-29T06:00:00Z | 1973-04-29 03:00:00 | -04:00 → -03:00 | ADT | Yes | gap |
| Canada/Atlantic | 1973-04-29T06:00:00Z | 1973-04-29 03:00:00 | -04:00 → -03:00 | ADT | Yes | gap |
| America/Detroit | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Indiana/Marengo | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Iqaluit | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Kentucky/Louisville | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Louisville | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Menominee | 1973-04-29T07:00:00Z | 1973-04-29 02:00:00 | -05:00 → -05:00 | CDT | Yes | offset-only |
| America/Montreal | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Nassau | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/New_York | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Nipigon | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Pangnirtung | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Thunder_Bay | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Toronto | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| Canada/Eastern | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| EST5EDT | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| US/Eastern | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| US/Michigan | 1973-04-29T07:00:00Z | 1973-04-29 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Chicago | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Indiana/Knox | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Indiana/Petersburg | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Kentucky/Monticello | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Knox_IN | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Rainy_River | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Rankin_Inlet | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Resolute | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Winnipeg | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| CST6CDT | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| Canada/Central | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| US/Central | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| US/Indiana-Starke | 1973-04-29T08:00:00Z | 1973-04-29 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Boise | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Cambridge_Bay | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Denver | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Edmonton | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/North_Dakota/Beulah | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/North_Dakota/Center | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/North_Dakota/New_Salem | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Shiprock | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Yellowknife | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| Canada/Mountain | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| MST7MDT | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| Navajo | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| US/Mountain | 1973-04-29T09:00:00Z | 1973-04-29 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Ensenada | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Fort_Nelson | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Inuvik | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Juneau | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Los_Angeles | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Metlakatla | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Santa_Isabel | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Sitka | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Tijuana | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Vancouver | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| Canada/Pacific | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| Mexico/BajaNorte | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| PST8PDT | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| US/Pacific | 1973-04-29T10:00:00Z | 1973-04-29 03:00:00 | -08:00 → -07:00 | PDT | Yes | gap |
| America/Yakutat | 1973-04-29T11:00:00Z | 1973-04-29 03:00:00 | -09:00 → -08:00 | YDT | Yes | gap |
| America/Anchorage | 1973-04-29T12:00:00Z | 1973-04-29 03:00:00 | -10:00 → -09:00 | AHDT | Yes | gap |
| US/Alaska | 1973-04-29T12:00:00Z | 1973-04-29 03:00:00 | -10:00 → -09:00 | AHDT | Yes | gap |
| America/Adak | 1973-04-29T13:00:00Z | 1973-04-29 03:00:00 | -11:00 → -10:00 | BDT | Yes | gap |
| America/Atka | 1973-04-29T13:00:00Z | 1973-04-29 03:00:00 | -11:00 → -10:00 | BDT | Yes | gap |
| America/Nome | 1973-04-29T13:00:00Z | 1973-04-29 03:00:00 | -11:00 → -10:00 | BDT | Yes | gap |
| US/Aleutian | 1973-04-29T13:00:00Z | 1973-04-29 03:00:00 | -11:00 → -10:00 | BDT | Yes | gap |
| Asia/Beirut | 1973-04-30T22:00:00Z | 1973-05-01 01:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Africa/Cairo | 1973-04-30T23:00:00Z | 1973-05-01 02:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Egypt | 1973-04-30T23:00:00Z | 1973-05-01 02:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Asia/Damascus | 1973-05-01T00:00:00Z | 1973-05-01 03:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| America/Managua | 1973-05-01T06:00:00Z | 1973-05-01 01:00:00 | -06:00 → -05:00 | EST | No | gap |
| Asia/Istanbul | 1973-06-02T23:00:00Z | 1973-06-03 02:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Europe/Istanbul | 1973-06-02T23:00:00Z | 1973-06-03 02:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Europe/Rome | 1973-06-02T23:00:00Z | 1973-06-03 01:00:00 | +01:00 → +02:00 | CEST | Yes | gap |
| Europe/San_Marino | 1973-06-02T23:00:00Z | 1973-06-03 01:00:00 | +01:00 → +02:00 | CEST | Yes | gap |
| Europe/Vatican | 1973-06-02T23:00:00Z | 1973-06-03 01:00:00 | +01:00 → +02:00 | CEST | Yes | gap |
| Turkey | 1973-06-02T23:00:00Z | 1973-06-03 02:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Asia/Amman | 1973-06-05T22:00:00Z | 1973-06-06 01:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Europe/Malta | 1973-09-28T23:00:00Z | 1973-09-29 00:00:00 | +02:00 → +01:00 | CET | No | overlap |
| Europe/Rome | 1973-09-29T23:00:00Z | 1973-09-30 00:00:00 | +02:00 → +01:00 | CET | No | overlap |
| Europe/San_Marino | 1973-09-29T23:00:00Z | 1973-09-30 00:00:00 | +02:00 → +01:00 | CET | No | overlap |
| Europe/Vatican | 1973-09-29T23:00:00Z | 1973-09-30 00:00:00 | +02:00 → +01:00 | CET | No | overlap |
| America/Coyhaique | 1973-09-30T04:00:00Z | 1973-09-30 01:00:00 | -04:00 → -03:00 | -03 | Yes | gap |
| America/Punta_Arenas | 1973-09-30T04:00:00Z | 1973-09-30 01:00:00 | -04:00 → -03:00 | -03 | Yes | gap |
| America/Santiago | 1973-09-30T04:00:00Z | 1973-09-30 01:00:00 | -04:00 → -03:00 | -03 | Yes | gap |
| Chile/Continental | 1973-09-30T04:00:00Z | 1973-09-30 01:00:00 | -04:00 → -03:00 | -03 | Yes | gap |
| Chile/EasterIsland | 1973-09-30T04:00:00Z | 1973-09-29 22:00:00 | -07:00 → -06:00 | -06 | Yes | gap |
| Pacific/Easter | 1973-09-30T04:00:00Z | 1973-09-29 22:00:00 | -07:00 → -06:00 | -06 | Yes | gap |
| Asia/Amman | 1973-09-30T21:00:00Z | 1973-09-30 23:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Asia/Beirut | 1973-09-30T21:00:00Z | 1973-09-30 23:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Asia/Damascus | 1973-09-30T23:00:00Z | 1973-10-01 01:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Africa/Cairo | 1973-10-01T00:00:00Z | 1973-10-01 02:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Egypt | 1973-10-01T00:00:00Z | 1973-10-01 02:00:00 | +03:00 → +02:00 | EET | No | overlap |
| America/Havana | 1973-10-08T04:00:00Z | 1973-10-07 23:00:00 | -04:00 → -05:00 | CST | No | overlap |
| Cuba | 1973-10-08T04:00:00Z | 1973-10-07 23:00:00 | -04:00 → -05:00 | CST | No | overlap |
| Africa/Juba | 1973-10-14T21:00:00Z | 1973-10-14 23:00:00 | +03:00 → +02:00 | CAT | No | overlap |
| Africa/Khartoum | 1973-10-14T21:00:00Z | 1973-10-14 23:00:00 | +03:00 → +02:00 | CAT | No | overlap |
| Asia/Hong_Kong | 1973-10-20T18:30:00Z | 1973-10-21 02:30:00 | +09:00 → +08:00 | HKT | No | overlap |
| Asia/Macao | 1973-10-20T18:30:00Z | 1973-10-21 02:30:00 | +09:00 → +08:00 | CST | No | overlap |
| Asia/Macau | 1973-10-20T18:30:00Z | 1973-10-21 02:30:00 | +09:00 → +08:00 | CST | No | overlap |
| Hongkong | 1973-10-20T18:30:00Z | 1973-10-21 02:30:00 | +09:00 → +08:00 | HKT | No | overlap |
| Antarctica/Macquarie | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/ACT | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Canberra | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Currie | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Hobart | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Melbourne | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/NSW | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Sydney | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Tasmania | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Victoria | 1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
| Australia/Adelaide | 1973-10-27T16:30:00Z | 1973-10-28 03:00:00 | +09:30 → +10:30 | ACDT | Yes | gap |
| Australia/Broken_Hill | 1973-10-27T16:30:00Z | 1973-10-28 03:00:00 | +09:30 → +10:30 | ACDT | Yes | gap |
| Australia/South | 1973-10-27T16:30:00Z | 1973-10-28 03:00:00 | +09:30 → +10:30 | ACDT | Yes | gap |
| Australia/Yancowinna | 1973-10-27T16:30:00Z | 1973-10-28 03:00:00 | +09:30 → +10:30 | ACDT | Yes | gap |
| Eire | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | Yes | overlap |
| Europe/Belfast | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Dublin | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | Yes | overlap |
| Europe/Guernsey | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Isle_of_Man | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Jersey | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/London | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| GB | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| GB-Eire | 1973-10-28T02:00:00Z | 1973-10-28 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| America/St_Johns | 1973-10-28T04:30:00Z | 1973-10-28 01:00:00 | -02:30 → -03:30 | NST | No | overlap |
| Canada/Newfoundland | 1973-10-28T04:30:00Z | 1973-10-28 01:00:00 | -02:30 → -03:30 | NST | No | overlap |
| America/Glace_Bay | 1973-10-28T05:00:00Z | 1973-10-28 01:00:00 | -03:00 → -04:00 | AST | No | overlap |
| America/Goose_Bay | 1973-10-28T05:00:00Z | 1973-10-28 01:00:00 | -03:00 → -04:00 | AST | No | overlap |
| America/Halifax | 1973-10-28T05:00:00Z | 1973-10-28 01:00:00 | -03:00 → -04:00 | AST | No | overlap |
| America/Santo_Domingo | 1973-10-28T05:00:00Z | 1973-10-28 00:30:00 | -05:00 → -04:30 | -0430 | Yes | gap |
| Canada/Atlantic | 1973-10-28T05:00:00Z | 1973-10-28 01:00:00 | -03:00 → -04:00 | AST | No | overlap |
| America/Detroit | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Indiana/Marengo | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Iqaluit | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Kentucky/Louisville | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Louisville | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Montreal | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Nassau | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/New_York | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Nipigon | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Pangnirtung | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Thunder_Bay | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Toronto | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| Canada/Eastern | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| EST5EDT | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| US/Eastern | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| US/Michigan | 1973-10-28T06:00:00Z | 1973-10-28 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Chicago | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Indiana/Knox | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Indiana/Petersburg | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Kentucky/Monticello | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Knox_IN | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Menominee | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Rankin_Inlet | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Resolute | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| CST6CDT | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| US/Central | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| US/Indiana-Starke | 1973-10-28T07:00:00Z | 1973-10-28 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Boise | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Cambridge_Bay | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Denver | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Edmonton | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/North_Dakota/Beulah | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/North_Dakota/Center | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/North_Dakota/New_Salem | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Rainy_River | 1973-10-28T08:00:00Z | 1973-10-28 02:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Shiprock | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Winnipeg | 1973-10-28T08:00:00Z | 1973-10-28 02:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Yellowknife | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| Canada/Central | 1973-10-28T08:00:00Z | 1973-10-28 02:00:00 | -05:00 → -06:00 | CST | No | overlap |
| Canada/Mountain | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| MST7MDT | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| Navajo | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| US/Mountain | 1973-10-28T08:00:00Z | 1973-10-28 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Dawson | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -09:00 → -08:00 | PST | No | gap |
| America/Ensenada | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Fort_Nelson | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Inuvik | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Juneau | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Los_Angeles | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Metlakatla | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Santa_Isabel | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Sitka | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Tijuana | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Vancouver | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| Canada/Pacific | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| Mexico/BajaNorte | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| PST8PDT | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| US/Pacific | 1973-10-28T09:00:00Z | 1973-10-28 01:00:00 | -07:00 → -08:00 | PST | No | overlap |
| America/Yakutat | 1973-10-28T10:00:00Z | 1973-10-28 01:00:00 | -08:00 → -09:00 | YST | No | overlap |
| America/Anchorage | 1973-10-28T11:00:00Z | 1973-10-28 01:00:00 | -09:00 → -10:00 | AHST | No | overlap |
| US/Alaska | 1973-10-28T11:00:00Z | 1973-10-28 01:00:00 | -09:00 → -10:00 | AHST | No | overlap |
| America/Adak | 1973-10-28T12:00:00Z | 1973-10-28 01:00:00 | -10:00 → -11:00 | BST | No | overlap |
| America/Atka | 1973-10-28T12:00:00Z | 1973-10-28 01:00:00 | -10:00 → -11:00 | BST | No | overlap |
| America/Nome | 1973-10-28T12:00:00Z | 1973-10-28 01:00:00 | -10:00 → -11:00 | BST | No | overlap |
| US/Aleutian | 1973-10-28T12:00:00Z | 1973-10-28 01:00:00 | -10:00 → -11:00 | BST | No | overlap |
| Asia/Istanbul | 1973-11-03T23:00:00Z | 1973-11-04 01:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Europe/Istanbul | 1973-11-03T23:00:00Z | 1973-11-04 01:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Turkey | 1973-11-03T23:00:00Z | 1973-11-04 01:00:00 | +03:00 → +02:00 | EET | No | overlap |
| America/Guatemala | 1973-11-25T06:00:00Z | 1973-11-25 01:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Belize | 1973-12-05T06:00:00Z | 1973-12-05 01:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| Pacific/Guam | 1973-12-15T16:00:00Z | 1973-12-16 03:00:00 | +10:00 → +11:00 | GDT | Yes | gap |
| Pacific/Saipan | 1973-12-15T16:00:00Z | 1973-12-16 03:00:00 | +10:00 → +11:00 | GDT | Yes | gap |
| Pacific/Efate | 1973-12-22T12:00:00Z | 1973-12-23 00:00:00 | +11:00 → +12:00 | +12 | Yes | gap |
| Asia/Hong_Kong | 1973-12-29T19:30:00Z | 1973-12-30 04:30:00 | +08:00 → +09:00 | HKST | Yes | gap |
| Asia/Macao | 1973-12-29T19:30:00Z | 1973-12-30 04:30:00 | +08:00 → +09:00 | CDT | Yes | gap |
| Asia/Macau | 1973-12-29T19:30:00Z | 1973-12-30 04:30:00 | +08:00 → +09:00 | CDT | Yes | gap |
| Hongkong | 1973-12-29T19:30:00Z | 1973-12-30 04:30:00 | +08:00 → +09:00 | HKST | Yes | gap |