1637

1637 (MDCXXXVII) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1637th year of the Common Era (CE) and Anno Domini (AD) designations, the 637th year of the 2nd millennium, the 37th year of the 17th century, and the 8th year of the 1630s decade. As of the start of 1637, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.

1637 in other calendars

Gregorian calendar	1637 MDCXXXVII
Ab urbe condita	2390
Armenian calendar	1086 ԹՎ ՌՁԶ
Assyrian calendar	6387
Balinese saka calendar	1558–1559
Bengali calendar	1044
Berber calendar	2587
English Regnal year	12 Cha. 1 – 13 Cha. 1
Buddhist calendar	2181
Burmese calendar	999
Byzantine calendar	7145–7146
Chinese calendar	丙子年 (Fire Rat) 4333 or 4273     — to — 丁丑年 (Fire Ox) 4334 or 4274
Coptic calendar	1353–1354
Discordian calendar	2803
Ethiopian calendar	1629–1630
Hebrew calendar	5397–5398
Hindu calendars
- Vikram Samvat	1693–1694
- Shaka Samvat	1558–1559
- Kali Yuga	4737–4738
Holocene calendar	11637
Igbo calendar	637–638
Iranian calendar	1015–1016
Islamic calendar	1046–1047
Japanese calendar	Kan'ei 14 (寛永１４年)
Javanese calendar	1558–1559
Julian calendar	Gregorian minus 10 days
Korean calendar	3970
Minguo calendar	275 before ROC 民前275年
Nanakshahi calendar	169
Thai solar calendar	2179–2180
Tibetan calendar	མེ་ཕོ་བྱི་བ་ལོ་ (male Fire-Rat) 1763 or 1382 or 610     — to — མེ་མོ་གླང་ལོ་ (female Fire-Ox) 1764 or 1383 or 611

Events

• February 3 – Tulip mania collapses in the United Provinces (now the Netherlands) by government order
• February 15 – Ferdinand III becomes Holy Roman Emperor
• December 17 – Shimabara Rebellion erupts in Japan
• Pierre de Fermat makes a marginal claim to have proof of what would become known as Fermat's last theorem.
• France places a few missionaries in the Côte d'Ivoire, a country it would come to rule more than 200 years later.
• England wages war against the Mashantucket Pequots
• First opera house, Teatro San Cassiona, opens in Venice
• René Descartes – Discours de la Methode
• Elizabeth Poole becomes the first woman to have founded a town (Taunton, Massachusetts) in the Americas.