Time Zone Changes in 1921
In 1921, 124 time zone transitions occurred across 65 regions worldwide. Clocks moved forward in 61 transitions (gaps) and turned back in 63 transitions (overlaps).
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Transitions in 1921 (124)
| Zone | Instant (UTC) | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|---|
| Africa/Accra | 1921-01-01T01:40:00Z | 1921-01-01 01:40:00 | +00:20 → +00:00 | GMT | No | overlap |
| America/El_Salvador | 1921-01-01T05:56:48Z | 1920-12-31 23:56:48 | -05:56:48 → -06:00 | CST | No | overlap |
| Pacific/Nauru | 1921-01-14T12:52:20Z | 1921-01-15 00:22:20 | +11:07:40 → +11:30 | +1130 | No | gap |
| America/Costa_Rica | 1921-01-15T05:36:13Z | 1921-01-14 23:36:13 | -05:36:13 → -06:00 | CST | No | overlap |
| America/Belize | 1921-02-13T05:30:00Z | 1921-02-12 23:30:00 | -05:30 → -06:00 | CST | No | overlap |
| Europe/Moscow | 1921-02-14T20:00:00Z | 1921-02-15 00:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
| W-SU | 1921-02-14T20:00:00Z | 1921-02-15 00:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
| Europe/Lisbon | 1921-03-01T00:00:00Z | 1921-03-01 01:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| Portugal | 1921-03-01T00:00:00Z | 1921-03-01 01:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| WET | 1921-03-01T00:00:00Z | 1921-03-01 01:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| Atlantic/Madeira | 1921-03-01T01:00:00Z | 1921-03-01 01:00:00 | -01:00 → +00:00 | +00 | Yes | gap |
| Atlantic/Azores | 1921-03-01T02:00:00Z | 1921-03-01 01:00:00 | -02:00 → -01:00 | -01 | Yes | gap |
| Africa/Algiers | 1921-03-14T23:00:00Z | 1921-03-15 00:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| CET | 1921-03-14T23:00:00Z | 1921-03-15 00:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| Europe/Brussels | 1921-03-14T23:00:00Z | 1921-03-15 00:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| Europe/Luxembourg | 1921-03-14T23:00:00Z | 1921-03-15 00:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| Europe/Monaco | 1921-03-14T23:00:00Z | 1921-03-15 00:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| Europe/Paris | 1921-03-14T23:00:00Z | 1921-03-15 00:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| MET | 1921-03-14T23:00:00Z | 1921-03-15 00:00:00 | +00:00 → +01:00 | WEST | Yes | gap |
| Atlantic/Reykjavik | 1921-03-20T00:00:00Z | 1921-03-20 00:00:00 | -01:00 → +00:00 | +00 | Yes | gap |
| Europe/Moscow | 1921-03-20T19:00:00Z | 1921-03-21 00:00:00 | +04:00 → +05:00 | +05 | Yes | gap |
| W-SU | 1921-03-20T19:00:00Z | 1921-03-21 00:00:00 | +04:00 → +05:00 | +05 | Yes | gap |
| America/Chicago | 1921-03-27T08:00:00Z | 1921-03-27 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| US/Central | 1921-03-27T08:00:00Z | 1921-03-27 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Denver | 1921-03-27T09:00:00Z | 1921-03-27 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Shiprock | 1921-03-27T09:00:00Z | 1921-03-27 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| Navajo | 1921-03-27T09:00:00Z | 1921-03-27 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| US/Mountain | 1921-03-27T09:00:00Z | 1921-03-27 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Tegucigalpa | 1921-04-01T05:48:52Z | 1921-03-31 23:48:52 | -05:48:52 → -06:00 | CST | No | overlap |
| Asia/Beirut | 1921-04-02T22:00:00Z | 1921-04-03 01:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Asia/Istanbul | 1921-04-02T22:00:00Z | 1921-04-03 01:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Europe/Istanbul | 1921-04-02T22:00:00Z | 1921-04-03 01:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Turkey | 1921-04-02T22:00:00Z | 1921-04-03 01:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| Eire | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Belfast | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Dublin | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Gibraltar | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Guernsey | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Isle_of_Man | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Jersey | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/London | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| GB | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| GB-Eire | 1921-04-03T02:00:00Z | 1921-04-03 03:00:00 | +00:00 → +01:00 | BST | Yes | gap |
| Europe/Amsterdam | 1921-04-04T01:40:28Z | 1921-04-04 03:00:00 | +00:19:32 → +01:19:32 | NST | Yes | gap |
| Asia/Damascus | 1921-04-17T00:00:00Z | 1921-04-17 03:00:00 | +02:00 → +03:00 | EEST | Yes | gap |
| America/New_York | 1921-04-24T07:00:00Z | 1921-04-24 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| US/Eastern | 1921-04-24T07:00:00Z | 1921-04-24 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Edmonton | 1921-04-24T09:00:00Z | 1921-04-24 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| America/Yellowknife | 1921-04-24T09:00:00Z | 1921-04-24 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| Canada/Mountain | 1921-04-24T09:00:00Z | 1921-04-24 03:00:00 | -07:00 → -06:00 | MDT | Yes | gap |
| Europe/Helsinki | 1921-04-30T22:20:11Z | 1921-05-01 00:20:11 | +01:39:49 → +02:00 | EET | No | gap |
| Europe/Mariehamn | 1921-04-30T22:20:11Z | 1921-05-01 00:20:11 | +01:39:49 → +02:00 | EET | No | gap |
| Europe/Tallinn | 1921-04-30T22:21:00Z | 1921-05-01 00:21:00 | +01:39 → +02:00 | EET | No | gap |
| America/Kentucky/Louisville | 1921-05-01T08:00:00Z | 1921-05-01 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/Louisville | 1921-05-01T08:00:00Z | 1921-05-01 03:00:00 | -06:00 → -05:00 | CDT | Yes | gap |
| America/St_Johns | 1921-05-02T02:30:52Z | 1921-05-02 00:00:00 | -03:30:52 → -02:30:52 | NDT | Yes | gap |
| Canada/Newfoundland | 1921-05-02T02:30:52Z | 1921-05-02 00:00:00 | -03:30:52 → -02:30:52 | NDT | Yes | gap |
| America/Halifax | 1921-05-06T04:00:00Z | 1921-05-06 01:00:00 | -04:00 → -03:00 | ADT | Yes | gap |
| Canada/Atlantic | 1921-05-06T04:00:00Z | 1921-05-06 01:00:00 | -04:00 → -03:00 | ADT | Yes | gap |
| America/Montreal | 1921-05-15T07:00:00Z | 1921-05-15 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Nipigon | 1921-05-15T07:00:00Z | 1921-05-15 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Thunder_Bay | 1921-05-15T07:00:00Z | 1921-05-15 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Toronto | 1921-05-15T07:00:00Z | 1921-05-15 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| Canada/Eastern | 1921-05-15T07:00:00Z | 1921-05-15 03:00:00 | -05:00 → -04:00 | EDT | Yes | gap |
| America/Denver | 1921-05-22T08:00:00Z | 1921-05-22 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Shiprock | 1921-05-22T08:00:00Z | 1921-05-22 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| Navajo | 1921-05-22T08:00:00Z | 1921-05-22 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| US/Mountain | 1921-05-22T08:00:00Z | 1921-05-22 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| Africa/Algiers | 1921-06-21T23:00:00Z | 1921-06-21 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| Atlantic/Reykjavik | 1921-06-23T01:00:00Z | 1921-06-23 00:00:00 | +00:00 → -01:00 | -01 | No | overlap |
| Europe/Moscow | 1921-08-31T19:00:00Z | 1921-08-31 23:00:00 | +05:00 → +04:00 | MSD | Yes | overlap |
| W-SU | 1921-08-31T19:00:00Z | 1921-08-31 23:00:00 | +05:00 → +04:00 | MSD | Yes | overlap |
| Africa/Accra | 1921-09-01T02:00:00Z | 1921-09-01 02:20:00 | +00:00 → +00:20 | +0020 | Yes | gap |
| America/Kentucky/Louisville | 1921-09-01T07:00:00Z | 1921-09-01 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Louisville | 1921-09-01T07:00:00Z | 1921-09-01 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/Halifax | 1921-09-05T03:00:00Z | 1921-09-04 23:00:00 | -03:00 → -04:00 | AST | No | overlap |
| Canada/Atlantic | 1921-09-05T03:00:00Z | 1921-09-04 23:00:00 | -03:00 → -04:00 | AST | No | overlap |
| America/Montreal | 1921-09-15T06:00:00Z | 1921-09-15 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Nipigon | 1921-09-15T06:00:00Z | 1921-09-15 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Thunder_Bay | 1921-09-15T06:00:00Z | 1921-09-15 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Toronto | 1921-09-15T06:00:00Z | 1921-09-15 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| Canada/Eastern | 1921-09-15T06:00:00Z | 1921-09-15 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/New_York | 1921-09-25T06:00:00Z | 1921-09-25 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| US/Eastern | 1921-09-25T06:00:00Z | 1921-09-25 01:00:00 | -04:00 → -05:00 | EST | No | overlap |
| America/Edmonton | 1921-09-25T08:00:00Z | 1921-09-25 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| America/Yellowknife | 1921-09-25T08:00:00Z | 1921-09-25 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| Canada/Mountain | 1921-09-25T08:00:00Z | 1921-09-25 01:00:00 | -06:00 → -07:00 | MST | No | overlap |
| Europe/Amsterdam | 1921-09-26T01:40:28Z | 1921-09-26 02:00:00 | +01:19:32 → +00:19:32 | AMT | No | overlap |
| Europe/Moscow | 1921-09-30T20:00:00Z | 1921-09-30 23:00:00 | +04:00 → +03:00 | MSK | No | overlap |
| W-SU | 1921-09-30T20:00:00Z | 1921-09-30 23:00:00 | +04:00 → +03:00 | MSK | No | overlap |
| Asia/Damascus | 1921-10-01T23:00:00Z | 1921-10-02 01:00:00 | +03:00 → +02:00 | EET | No | overlap |
| America/Belize | 1921-10-02T06:00:00Z | 1921-10-02 00:30:00 | -06:00 → -05:30 | -0530 | Yes | gap |
| Asia/Beirut | 1921-10-02T21:00:00Z | 1921-10-02 23:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Asia/Istanbul | 1921-10-02T21:00:00Z | 1921-10-02 23:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Europe/Istanbul | 1921-10-02T21:00:00Z | 1921-10-02 23:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Turkey | 1921-10-02T21:00:00Z | 1921-10-02 23:00:00 | +03:00 → +02:00 | EET | No | overlap |
| Eire | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Belfast | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Dublin | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Gibraltar | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Guernsey | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Isle_of_Man | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Jersey | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/London | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| GB | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| GB-Eire | 1921-10-03T02:00:00Z | 1921-10-03 02:00:00 | +01:00 → +00:00 | GMT | No | overlap |
| Europe/Lisbon | 1921-10-14T23:00:00Z | 1921-10-14 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| Portugal | 1921-10-14T23:00:00Z | 1921-10-14 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| WET | 1921-10-14T23:00:00Z | 1921-10-14 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| Atlantic/Madeira | 1921-10-15T00:00:00Z | 1921-10-14 23:00:00 | +00:00 → -01:00 | -01 | No | overlap |
| Atlantic/Azores | 1921-10-15T01:00:00Z | 1921-10-14 23:00:00 | -01:00 → -02:00 | -02 | No | overlap |
| CET | 1921-10-25T23:00:00Z | 1921-10-25 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| Europe/Brussels | 1921-10-25T23:00:00Z | 1921-10-25 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| Europe/Monaco | 1921-10-25T23:00:00Z | 1921-10-25 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| Europe/Paris | 1921-10-25T23:00:00Z | 1921-10-25 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| MET | 1921-10-25T23:00:00Z | 1921-10-25 23:00:00 | +01:00 → +00:00 | WET | No | overlap |
| Europe/Luxembourg | 1921-10-26T01:00:00Z | 1921-10-26 01:00:00 | +01:00 → +00:00 | WET | No | overlap |
| America/Chicago | 1921-10-30T07:00:00Z | 1921-10-30 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| US/Central | 1921-10-30T07:00:00Z | 1921-10-30 01:00:00 | -05:00 → -06:00 | CST | No | overlap |
| America/St_Johns | 1921-10-31T01:30:52Z | 1921-10-30 22:00:00 | -02:30:52 → -03:30:52 | NST | No | overlap |
| Canada/Newfoundland | 1921-10-31T01:30:52Z | 1921-10-30 22:00:00 | -02:30:52 → -03:30:52 | NST | No | overlap |
| Asia/Famagusta | 1921-11-13T21:44:12Z | 1921-11-13 23:44:12 | +02:15:48 → +02:00 | EET | No | overlap |
| Asia/Nicosia | 1921-11-13T21:46:32Z | 1921-11-13 23:46:32 | +02:13:28 → +02:00 | EET | No | overlap |
| Europe/Nicosia | 1921-11-13T21:46:32Z | 1921-11-13 23:46:32 | +02:13:28 → +02:00 | EET | No | overlap |