| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1660 by topic |
|---|
| Arts and science |
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Works category |
| Gregorian calendar | 1660 MDCLX |
| Ab urbe condita | 2413 |
| Armenian calendar | 1109 ԹՎ ՌՃԹ |
| Assyrian calendar | 6410 |
| Balinese saka calendar | 1581–1582 |
| Bengali calendar | 1067 |
| Berber calendar | 2610 |
| English Regnal year | 11 Cha. 2 – 12 Cha. 2 |
| Buddhist calendar | 2204 |
| Burmese calendar | 1022 |
| Byzantine calendar | 7168–7169 |
| Chinese calendar | 己亥年 (Earth Pig) 4357 or 4150 — to — 庚子年 (Metal Rat) 4358 or 4151 |
| Coptic calendar | 1376–1377 |
| Discordian calendar | 2826 |
| Ethiopian calendar | 1652–1653 |
| Hebrew calendar | 5420–5421 |
| Hindu calendars | |
| - Vikram Samvat | 1716–1717 |
| - Shaka Samvat | 1581–1582 |
| - Kali Yuga | 4760–4761 |
| Holocene calendar | 11660 |
| Igbo calendar | 660–661 |
| Iranian calendar | 1038–1039 |
| Islamic calendar | 1070–1071 |
| Japanese calendar | Manji 3 (万治３年) |
| Javanese calendar | 1582–1583 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 3993 |
| Minguo calendar | 252 before ROC 民前252年 |
| Nanakshahi calendar | 192 |
| Thai solar calendar | 2202–2203 |
| Tibetan calendar | 阴土猪年 (female Earth-Pig) 1786 or 1405 or 633 — to — 阳金鼠年 (male Iron-Rat) 1787 or 1406 or 634 |
1660 (MDCLX) was a leap year starting on Thursday of the Gregorian calendar and a leap year starting on Sunday of the Julian calendar, the 1660th year of the Common Era (CE) and Anno Domini (AD) designations, the 660th year of the 2nd millennium, the 60th year of the 17th century, and the 1st year of the 1660s decade. As of the start of 1660, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.