1670

1670 (MDCLXX) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1670th year of the Common Era (CE) and Anno Domini (AD) designations, the 670th year of the 2nd millennium, the 70th year of the 17th century, and the 1st year of the 1670s decade. As of the start of 1670, 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:	1640s  1650s  1660s  – 1670s –  1680s  1690s  1700s
Years:	1667 1668 1669 – 1670 – 1671 1672 1673

1670 in other calendars

Gregorian calendar	1670 MDCLXX
Ab urbe condita	2423
Armenian calendar	1119 ԹՎ ՌՃԺԹ
Assyrian calendar	6420
Balinese saka calendar	1591–1592
Bengali calendar	1077
Berber calendar	2620
English Regnal year	21 Cha. 2 – 22 Cha. 2
Buddhist calendar	2214
Burmese calendar	1032
Byzantine calendar	7178–7179
Chinese calendar	己酉年 (Earth Rooster) 4366 or 4306     — to — 庚戌年 (Metal Dog) 4367 or 4307
Coptic calendar	1386–1387
Discordian calendar	2836
Ethiopian calendar	1662–1663
Hebrew calendar	5430–5431
Hindu calendars
- Vikram Samvat	1726–1727
- Shaka Samvat	1591–1592
- Kali Yuga	4770–4771
Holocene calendar	11670
Igbo calendar	670–671
Iranian calendar	1048–1049
Islamic calendar	1080–1081
Japanese calendar	Kanbun 9 (寛文９年)
Javanese calendar	1592–1593
Julian calendar	Gregorian minus 10 days
Korean calendar	4003
Minguo calendar	242 before ROC 民前242年
Nanakshahi calendar	202
Thai solar calendar	2212–2213
Tibetan calendar	ས་མོ་བྱ་ལོ་ (female Earth-Bird) 1796 or 1415 or 643     — to — ལྕགས་ཕོ་ཁྱི་ལོ་ (male Iron-Dog) 1797 or 1416 or 644

Events

• April 29 – Pope Clement X succeeds Pope Clement IX as the 239th pope.
• July 18 – Spain recognises Jamaica and the Cayman Islands as English possessions by the Treaty of Madrid.