1631

Millennium: 2nd millennium
Centuries:
Decades:
Years:
May 20: The city of Magdeburg is sacked by the army of the Holy Roman Empire and 20,000 residents are killed
September 17: The first Protestant victory in the Thirty Years' War is accomplished by Sweden at the Battle of Breitenfeld, almost four months after Tilly's massacre of Protestants at Magdeburg.
September 12–13: The Netherlands sinks 83 Spanish ships in the Battle of the Slaak.
1631 by topic
Arts and science
Leaders
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
Works category
1631 in various calendars
Gregorian calendar1631
MDCXXXI
Ab urbe condita2384
Armenian calendar1080
ԹՎ ՌՁ
Assyrian calendar6381
Balinese saka calendar1552–1553
Bengali calendar1038
Berber calendar2581
English Regnal year6 Cha. 1 – 7 Cha. 1
Buddhist calendar2175
Burmese calendar993
Byzantine calendar7139–7140
Chinese calendar庚午年 (Metal Horse)
4328 or 4121
    — to —
辛未年 (Metal Goat)
4329 or 4122
Coptic calendar1347–1348
Discordian calendar2797
Ethiopian calendar1623–1624
Hebrew calendar5391–5392
Hindu calendars
 - Vikram Samvat1687–1688
 - Shaka Samvat1552–1553
 - Kali Yuga4731–4732
Holocene calendar11631
Igbo calendar631–632
Iranian calendar1009–1010
Islamic calendar1040–1041
Japanese calendarKan'ei 8
(寛永８年)
Javanese calendar1552–1553
Julian calendarGregorian minus 10 days
Korean calendar3964
Minguo calendar281 before ROC
民前281年
Nanakshahi calendar163
Thai solar calendar2173–2174
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

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.