1668
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1668 by topic: | |
| Arts and Science | |
| Architecture - Art - Literature - Music - Science | |
| Lists of leaders | |
| State leaders – Colonial governors – Religious leaders | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Works category | |
| Works | |
| Gregorian calendar | 1668 MDCLXVIII |
| Ab urbe condita | 2421 |
| Armenian calendar | 1117 ԹՎ ՌՃԺԷ |
| Assyrian calendar | 6418 |
| Bengali calendar | 1075 |
| Berber calendar | 2618 |
| English Regnal year | 19 Cha. 2 – 20 Cha. 2 |
| Buddhist calendar | 2212 |
| Burmese calendar | 1030 |
| Byzantine calendar | 7176–7177 |
| Chinese calendar |
丁未年 (Fire Goat) 4364 or 4304 — to — 戊申年 (Earth Monkey) 4365 or 4305 |
| Coptic calendar | 1384–1385 |
| Discordian calendar | 2834 |
| Ethiopian calendar | 1660–1661 |
| Hebrew calendar | 5428–5429 |
| Hindu calendars | |
| - Vikram Samvat | 1724–1725 |
| - Shaka Samvat | 1589–1590 |
| - Kali Yuga | 4768–4769 |
| Holocene calendar | 11668 |
| Igbo calendar | 668–669 |
| Iranian calendar | 1046–1047 |
| Islamic calendar | 1078–1079 |
| Japanese calendar |
Kanbun 7 (寛文７年) |
| Javanese calendar | 1590–1591 |
| Julian calendar | Gregorian minus 10 days |
| Korean calendar | 4001 |
| Minguo calendar | 244 before ROC 民前244年 |
| Nanakshahi calendar | 200 |
| Thai solar calendar | 2210–2211 |
1668
1668 (MDCLXVIII) was a leap year starting on Sunday (dominical letter AG) of the Gregorian calendar and a leap year starting on Wednesday (dominical letter ED) of the Julian calendar, the 1668th year of the Common Era (CE) and Anno Domini (AD) designations, the 668th year of the 2nd millennium, the 68th year of the 17th century, and the 9th year of the 1660s decade. As of the start of 1668, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.
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