1657

Millennium:	2nd millennium
Centuries:	16th century – 17th century – 18th century
Decades:	1620s  1630s  1640s  – 1650s –  1660s  1670s  1680s
Years:	1654 1655 1656 – 1657 – 1658 1659 1660

1657 in other calendars

Gregorian calendar	1657 MDCLVII
Ab urbe condita	2410
Armenian calendar	1106 ԹՎ ՌՃԶ
Assyrian calendar	6407
Balinese saka calendar	1578–1579
Bengali calendar	1064
Berber calendar	2607
English Regnal year	8 Cha. 2 – 9 Cha. 2 (Interregnum)
Buddhist calendar	2201
Burmese calendar	1019
Byzantine calendar	7165–7166
Chinese calendar	丙申年 (Fire Monkey) 4353 or 4293     — to — 丁酉年 (Fire Rooster) 4354 or 4294
Coptic calendar	1373–1374
Discordian calendar	2823
Ethiopian calendar	1649–1650
Hebrew calendar	5417–5418
Hindu calendars
- Vikram Samvat	1713–1714
- Shaka Samvat	1578–1579
- Kali Yuga	4757–4758
Holocene calendar	11657
Igbo calendar	657–658
Iranian calendar	1035–1036
Islamic calendar	1067–1068
Japanese calendar	Meireki 3 (明暦３年)
Javanese calendar	1579–1580
Julian calendar	Gregorian minus 10 days
Korean calendar	3990
Minguo calendar	255 before ROC 民前255年
Nanakshahi calendar	189
Thai solar calendar	2199–2200
Tibetan calendar	阳火猴年 (male Fire-Monkey) 1783 or 1402 or 630     — to — 阴火鸡年 (female Fire-Rooster) 1784 or 1403 or 631

1657 (MDCLVII) was a common year starting on Monday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar, the 1657th year of the Common Era (CE) and Anno Domini (AD) designations, the 657th year of the 2nd millennium, the 57th year of the 17th century, and the 8th year of the 1650s decade. As of the start of 1657, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.

Events

• September 24 – The first autopsy and coroner's jury verdict are recorded in the Colony of Maryland.

Date unknown

• Christiaan Huygens writes the first book to be published on probability theory, De ratiociniis in ludo aleae ("On Reasoning in Games of Chance").