1621

Millennium: 2nd millennium
Centuries: 16th century – 17th century – 18th century
Decades: 1590s  1600s  1610s  – 1620s –  1630s  1640s  1650s
Years: 1618 1619 1620 – 1621 – 1622 1623 1624
1621 in other calendars
Gregorian calendar1621
MDCXXI
Ab urbe condita2374
Armenian calendar1070
ԹՎ ՌՀ
Assyrian calendar6371
Balinese saka calendar1542–1543
Bengali calendar1028
Berber calendar2571
English Regnal year18 Ja. 1 – 19 Ja. 1
Buddhist calendar2165
Burmese calendar983
Byzantine calendar7129–7130
Chinese calendar庚申年 (Metal Monkey)
4317 or 4257
    — to —
辛酉年 (Metal Rooster)
4318 or 4258
Coptic calendar1337–1338
Discordian calendar2787
Ethiopian calendar1613–1614
Hebrew calendar5381–5382
Hindu calendars
 - Vikram Samvat1677–1678
 - Shaka Samvat1542–1543
 - Kali Yuga4721–4722
Holocene calendar11621
Igbo calendar621–622
Iranian calendar999–1000
Islamic calendar1030–1031
Japanese calendarGenna 7
(元和７年)
Javanese calendar1542–1543
Julian calendarGregorian minus 10 days
Korean calendar3954
Minguo calendar291 before ROC
民前291年
Nanakshahi calendar153
Thai solar calendar2163–2164
Tibetan calendar阳金猴年
(male Iron-Monkey)
1747 or 1366 or 594
    — to —
阴金鸡年
(female Iron-Rooster)
1748 or 1367 or 595

1621 (MDCXXI) was a common year starting on Friday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1621st year of the Common Era (CE) and Anno Domini (AD) designations, the 621st year of the 2nd millennium, the 21st year of the 17th century, and the 2nd year of the 1620s decade. As of the start of 1621, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.

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