| Years: 1074 1075 1076 - 1077 - 1078 1079 1080 | |
| Decades: 1040s 1050s 1060s - 1070s - 1080s 1090s 1100s | |
| Centuries: 10th century - 11th century - 12th century | |
| Gregorian calendar | 1077 MLXXVII |
| Ab urbe condita | 1830 |
| Armenian calendar | 526 ԹՎ ՇԻԶ |
| Assyrian calendar | 5827 |
| Balinese saka calendar | 998–999 |
| Bengali calendar | 483–484 |
| Berber calendar | 2027 |
| English Regnal year | 11 Will. 1 – 12 Will. 1 |
| Buddhist calendar | 1621 |
| Burmese calendar | 439 |
| Byzantine calendar | 6585–6586 |
| Chinese calendar | 丙辰年 (Fire Dragon) 3774 or 3567 — to — 丁巳年 (Fire Snake) 3775 or 3568 |
| Coptic calendar | 793–794 |
| Discordian calendar | 2243 |
| Ethiopian calendar | 1069–1070 |
| Hebrew calendar | 4837–4838 |
| Hindu calendars | |
| - Vikram Samvat | 1133–1134 |
| - Shaka Samvat | 998–999 |
| - Kali Yuga | 4177–4178 |
| Holocene calendar | 11077 |
| Igbo calendar | 77–78 |
| Iranian calendar | 455–456 |
| Islamic calendar | 469–470 |
| Japanese calendar | Jōhō 4 / Jōryaku 1 (承暦元年) |
| Javanese calendar | 981–982 |
| Julian calendar | 1077 MLXXVII |
| Korean calendar | 3410 |
| Minguo calendar | 835 before ROC 民前835年 |
| Nanakshahi calendar | −391 |
| Seleucid era | 1388/1389 AG |
| Thai solar calendar | 1619–1620 |
| Tibetan calendar | མེ་ཕོ་འབྲུག་ལོ་ (male Fire-Dragon) 1203 or 822 or 50 — to — མེ་མོ་སྦྲུལ་ལོ་ (female Fire-Snake) 1204 or 823 or 51 |
Events
- January 26 - Henry IV, Holy Roman Emperor visits Pope Gregory VII as a penitent, asking him remove sentence of excommunication.
- January 28 - Walk to Canossa: The excommunication of Henry IV, Holy Roman Emperor is lifted.
- April 3 - Creation of the first Parliament of Friuli.
- Robert Curthose instigates his first insurrection against his father, William the Conqueror.
- Seljuk Turks capture Nicaea.
- Süleyman I of Rüm becomes the leader of the Sultanate of Rüm in modern Turkey.
- Anush Tigin Gharchai becomes leader of the Khwarezmid Empire in modern Turkey.
- Foundation of the kingdom of Duklja.
- Khristosolos of Alexandria ends reign as Coptic Pope.
- Walk to Canossa chapter of the Investiture Controversy.
- The Bayeux Tapestry is made.
- First recorded Trial by combat in England.
- First English Cluniac Benedictine priory established.
- Dionysius V Lazaros becomes Syrian Patriarch of Antioch.
- Foundation of the independent state of Friuli in modern Italy.
- Vsevolod of Kiev becomes prince of Kievan Rus'.
Deaths
- April 25 - Geza I of Hungary
- Agnes de Poitou, wife of Henry III, Holy Roman Emperor and regent (b. 1020)
- King Anawrahta of Myanmar (b. 1044)
- Abolfazl Beyhaghi, Persian historian and author (b. 995)