1631

1631 (MDCXXXI) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1631st year of the Common Era (CE) and Anno Domini (AD) designations, the 631st year of the 2nd millennium, the 31st year of the 17th century, and the 2nd year of the 1630s decade. As of the start of 1631, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.

Millennium:	2nd millennium
Centuries:	16th century – 17th century – 18th century
Decades:	1600s  1610s  1620s  – 1630s –  1640s  1650s  1660s
Years:	1628 1629 1630 – 1631 – 1632 1633 1634

1631 in other calendars

Gregorian calendar	1631 MDCXXXI
Ab urbe condita	2384
Armenian calendar	1080 ԹՎ ՌՁ
Assyrian calendar	6381
Balinese saka calendar	1552–1553
Bengali calendar	1038
Berber calendar	2581
English Regnal year	6 Cha. 1 – 7 Cha. 1
Buddhist calendar	2175
Burmese calendar	993
Byzantine calendar	7139–7140
Chinese calendar	庚午年 (Metal Horse) 4327 or 4267     — to — 辛未年 (Metal Goat) 4328 or 4268
Coptic calendar	1347–1348
Discordian calendar	2797
Ethiopian calendar	1623–1624
Hebrew calendar	5391–5392
Hindu calendars
- Vikram Samvat	1687–1688
- Shaka Samvat	1552–1553
- Kali Yuga	4731–4732
Holocene calendar	11631
Igbo calendar	631–632
Iranian calendar	1009–1010
Islamic calendar	1040–1041
Japanese calendar	Kan'ei 8 (寛永８年)
Javanese calendar	1552–1553
Julian calendar	Gregorian minus 10 days
Korean calendar	3964
Minguo calendar	281 before ROC 民前281年
Nanakshahi calendar	163
Thai solar calendar	2173–2174
Tibetan calendar	阳金马年 (male Iron-Horse) 1757 or 1376 or 604     — to — 阴金羊年 (female Iron-Goat) 1758 or 1377 or 605

Events

• May 18 – In Massachusetts, John Winthrop takes the oath of office and becomes the first Governor of Massachusetts.