| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1651 by topic |
|---|
| Arts and science |
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Works category |
| Gregorian calendar | 1651 MDCLI |
| Ab urbe condita | 2404 |
| Armenian calendar | 1100 ԹՎ ՌՃ |
| Assyrian calendar | 6401 |
| Balinese saka calendar | 1572–1573 |
| Bengali calendar | 1058 |
| Berber calendar | 2601 |
| English Regnal year | 2 Cha. 2 – 3 Cha. 2 (Interregnum) |
| Buddhist calendar | 2195 |
| Burmese calendar | 1013 |
| Byzantine calendar | 7159–7160 |
| Chinese calendar | 庚寅年 (Metal Tiger) 4348 or 4141 — to — 辛卯年 (Metal Rabbit) 4349 or 4142 |
| Coptic calendar | 1367–1368 |
| Discordian calendar | 2817 |
| Ethiopian calendar | 1643–1644 |
| Hebrew calendar | 5411–5412 |
| Hindu calendars | |
| - Vikram Samvat | 1707–1708 |
| - Shaka Samvat | 1572–1573 |
| - Kali Yuga | 4751–4752 |
| Holocene calendar | 11651 |
| Igbo calendar | 651–652 |
| Iranian calendar | 1029–1030 |
| Islamic calendar | 1061–1062 |
| Japanese calendar | Keian 4 (慶安４年) |
| Javanese calendar | 1572–1573 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 3984 |
| Minguo calendar | 261 before ROC 民前261年 |
| Nanakshahi calendar | 183 |
| Thai solar calendar | 2193–2194 |
| Tibetan calendar | 阳金虎年 (male Iron-Tiger) 1777 or 1396 or 624 — to — 阴金兔年 (female Iron-Rabbit) 1778 or 1397 or 625 |
1651 (MDCLI) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1651st year of the Common Era (CE) and Anno Domini (AD) designations, the 651st year of the 2nd millennium, the 51st year of the 17th century, and the 2nd year of the 1650s decade. As of the start of 1651, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.