1691

Millennium:	2nd millennium
Centuries:	16th century 17th century 18th century
Decades:	1670s 1680s 1690s 1700s 1710s
Years:	1688 1689 1690 1691 1692 1693 1694

1691 by topic:
Arts and Science
Architecture - Art - Literature - Music - Science
Lists of leaders
State leaders – Colonial & territorial governors – Religious leaders
Birth and death categories
Births - Deaths
Establishments and disestablishments categories
Establishments - Disestablishments
Works category
Works

1691 in various calendars
Gregorian calendar	1691 MDCXCI
Ab urbe condita	2444
Armenian calendar	1140 ԹՎ ՌՃԽ
Assyrian calendar	6441
Bengali calendar	1098
Berber calendar	2641
English Regnal year	3 Will. & Mar. – 4 Will. & Mar.
Buddhist calendar	2235
Burmese calendar	1053
Byzantine calendar	7199–7200
Chinese calendar	庚午年 (Metal Horse) 4387 or 4327 — to — 辛未年 (Metal Goat) 4388 or 4328
Coptic calendar	1407–1408
Discordian calendar	2857
Ethiopian calendar	1683–1684
Hebrew calendar	5451–5452
Hindu calendars
- Vikram Samvat	1747–1748
- Shaka Samvat	1612–1613
- Kali Yuga	4791–4792
Holocene calendar	11691
Igbo calendar	691–692
Iranian calendar	1069–1070
Islamic calendar	1102–1103
Japanese calendar	Genroku 4 (元禄４年)
Javanese calendar	1614–1615
Julian calendar	Gregorian minus 10 days
Korean calendar	4024
Minguo calendar	221 before ROC 民前221年
Nanakshahi calendar	223
Thai solar calendar	2233–2234
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1691 (MDCXCI) was a common year starting on Monday (dominical letter G) of the Gregorian calendar and a common year starting on Thursday (dominical letter D) of the Julian calendar, the 1691st year of the Common Era (CE) and Anno Domini (AD) designations, the 691st year of the 2nd millennium, the 91st year of the 17th century, and the 2nd year of the 1690s decade. As of the start of 1691, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.

This is one of the numbers, in certain fonts, that can be read upside down, and displays the same number.