1646

1646 (MDCXLVI) was a common year starting on Monday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar, the 1646th year of the Common Era (CE) and Anno Domini (AD) designations, the 646th year of the 2nd millennium, the 46th year of the 17th century, and the 7th year of the 1640s decade. As of the start of 1646, 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:	1610s  1620s  1630s  – 1640s –  1650s  1660s  1670s
Years:	1643 1644 1645 – 1646 – 1647 1648 1649

1646 in other calendars

Gregorian calendar	1646 MDCXLVI
Ab urbe condita	2399
Armenian calendar	1095 ԹՎ ՌՂԵ
Assyrian calendar	6396
Balinese saka calendar	1567–1568
Bengali calendar	1053
Berber calendar	2596
English Regnal year	21 Cha. 1 – 22 Cha. 1
Buddhist calendar	2190
Burmese calendar	1008
Byzantine calendar	7154–7155
Chinese calendar	乙酉年 (Wood Rooster) 4342 or 4282     — to — 丙戌年 (Fire Dog) 4343 or 4283
Coptic calendar	1362–1363
Discordian calendar	2812
Ethiopian calendar	1638–1639
Hebrew calendar	5406–5407
Hindu calendars
- Vikram Samvat	1702–1703
- Shaka Samvat	1567–1568
- Kali Yuga	4746–4747
Holocene calendar	11646
Igbo calendar	646–647
Iranian calendar	1024–1025
Islamic calendar	1055–1056
Japanese calendar	Shōhō 3 (正保３年)
Javanese calendar	1567–1568
Julian calendar	Gregorian minus 10 days
Korean calendar	3979
Minguo calendar	266 before ROC 民前266年
Nanakshahi calendar	178
Thai solar calendar	2188–2189
Tibetan calendar	ཤིང་མོ་བྱ་ལོ་ (female Wood-Bird) 1772 or 1391 or 619     — to — མེ་ཕོ་ཁྱི་ལོ་ (male Fire-Dog) 1773 or 1392 or 620

Events

• February 16 – First English Civil War: The Battle of Great Torrington, Devon, the last major battle of the conflict, is fought.
• December 21 – Temperatures around the world start to decline as part of the Little Ice Age.

Deaths

• December 22 – Peter Mogila, Orthodox Metropolitan of Kiev and Galicia (b. 1596)