1661
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1661 by topic: | |
| Arts and Science | |
| Architecture - Art - Literature - Music - Science | |
| Lists of leaders | |
| State leaders – Colonial & territorial governors – Religious leaders | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Works category | |
| Works | |
| Gregorian calendar | 1661 MDCLXI |
| Ab urbe condita | 2414 |
| Armenian calendar | 1110 ԹՎ ՌՃԺ |
| Assyrian calendar | 6411 |
| Bengali calendar | 1068 |
| Berber calendar | 2611 |
| English Regnal year | 12 Cha. 2 – 13 Cha. 2 |
| Buddhist calendar | 2205 |
| Burmese calendar | 1023 |
| Byzantine calendar | 7169–7170 |
| Chinese calendar |
庚子年 (Metal Rat) 4357 or 4297 — to — 辛丑年 (Metal Ox) 4358 or 4298 |
| Coptic calendar | 1377–1378 |
| Discordian calendar | 2827 |
| Ethiopian calendar | 1653–1654 |
| Hebrew calendar | 5421–5422 |
| Hindu calendars | |
| - Vikram Samvat | 1717–1718 |
| - Shaka Samvat | 1582–1583 |
| - Kali Yuga | 4761–4762 |
| Holocene calendar | 11661 |
| Igbo calendar | 661–662 |
| Iranian calendar | 1039–1040 |
| Islamic calendar | 1071–1072 |
| Japanese calendar |
Manji 4 (万治４年) |
| Javanese calendar | 1583–1584 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 3994 |
| Minguo calendar | 251 before ROC 民前251年 |
| Nanakshahi calendar | 193 |
| Thai solar calendar | 2203–2204 |
1661 (MDCLXI) was a common year starting on Saturday (dominical letter B) of the Gregorian calendar and a common year starting on Tuesday (dominical letter F) of the Julian calendar, the 1661st year of the Common Era (CE) and Anno Domini (AD) designations, the 661st year of the 2nd millennium, the 61st year of the 17th century, and the 2nd year of the 1660s decade. As of the start of 1661, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.
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