Perubahan waktu musim panas pada 2021
- Albania
- Andora
- Australia
- Austria
- Bahama
- Belanda
- Belgia
- Bermuda
- Bosnia dan Herzegovina
- Bulgaria
- Ceko
- Cile
- Denmark
- Estonia
- Fiji
- Finlandia
- Gibraltar
- Grinlandia
- Haiti
- Hungaria
- Inggris Raya
- Iran
- Irlandia
- Israel
- Italia
- Jerman
- Jersey
- Kanada
- Kepulauan Aland
- Kepulauan Faroe
- Kepulauan Norfolk
- Kepulauan Svalbard dan Jan Mayen
- Kepulauan Turks dan Caicos
- Kosovo
- Kroasia
- Kuba
- Latvia
- Libanon
- Liktenstin
- Lituania
- Luksemburg
- Makedonia Utara
- Malta
- Maroko
- Meksiko
- Monako
- Montenegro
- Norwegia
- Paraguai
- Polandia
- Portugal
- Prancis
- Pulau Man
- Rumania
- Saint Pierre dan Miquelon
- Samoa
- Selandia Baru
| Negara | Perubahan DST berikutnya | Arah |
|---|---|---|
| Albania | 2021-03-28 | maju |
| Andora | 2021-03-28 | maju |
| Australia | 2021-04-03 | mundur |
| Austria | 2021-03-28 | maju |
| Bahama | 2021-03-14 | maju |
| Belanda | 2021-03-28 | maju |
| Belgia | 2021-03-28 | maju |
| Bermuda | 2021-03-14 | maju |
| Bosnia dan Herzegovina | 2021-03-28 | maju |
| Bulgaria | 2021-03-28 | maju |
| Ceko | 2021-03-28 | maju |
| Cile | 2021-04-04 | mundur |
| Denmark | 2021-03-28 | maju |
| Estonia | 2021-03-28 | maju |
| Fiji | 2021-01-16 | mundur |
| Finlandia | 2021-03-28 | maju |
| Gibraltar | 2021-03-28 | maju |
| Grinlandia | 2021-03-28 | maju |
| Haiti | 2021-03-14 | maju |
| Hungaria | 2021-03-28 | maju |
| Inggris Raya | 2021-03-28 | maju |
| Iran | 2021-03-21 | maju |
| Irlandia | 2021-03-28 | maju |
| Israel | 2021-03-26 | maju |
| Italia | 2021-03-28 | maju |
| Jerman | 2021-03-28 | maju |
| Jersey | 2021-03-28 | maju |
| Kanada | 2021-03-14 | maju |
| Kepulauan Aland | 2021-03-28 | maju |
| Kepulauan Faroe | 2021-03-28 | maju |
| Kepulauan Norfolk | 2021-04-03 | mundur |
| Kepulauan Svalbard dan Jan Mayen | 2021-03-28 | maju |
| Kepulauan Turks dan Caicos | 2021-03-14 | maju |
| Kosovo | 2021-03-28 | maju |
| Kroasia | 2021-03-28 | maju |
| Kuba | 2021-03-14 | maju |
| Latvia | 2021-03-28 | maju |
| Libanon | 2021-03-27 | maju |
| Liktenstin | 2021-03-28 | maju |
| Lituania | 2021-03-28 | maju |
| Luksemburg | 2021-03-28 | maju |
| Makedonia Utara | 2021-03-28 | maju |
| Malta | 2021-03-28 | maju |
| Maroko | 2021-04-11 | mundur |
| Meksiko | 2021-04-04 | maju |
| Monako | 2021-03-28 | maju |
| Montenegro | 2021-03-28 | maju |
| Norwegia | 2021-03-28 | maju |
| Paraguai | 2021-03-28 | mundur |
| Polandia | 2021-03-28 | maju |
| Portugal | 2021-03-28 | maju |
| Prancis | 2021-03-28 | maju |
| Pulau Man | 2021-03-28 | maju |
| Rumania | 2021-03-28 | maju |
| Saint Pierre dan Miquelon | 2021-03-14 | maju |
| Samoa | 2021-04-03 | mundur |
| Selandia Baru | 2021-04-03 | mundur |