September 21st (1643) was a Monday. It's the 263rd day of the year (264th in leap years) in the Gregorian calendar. There are 102 days left to the end of the year.
September 21st Holidays in History
» Autumnal equinox observances in the Northern hemisphere, vernal equinox observances in the Southern hemisphere (see September 22):
» Arbor Day (Brazil)
» Spring Day (Argentina)
» Christian Calendar of saints called Feast Day:
» Matthew the Evangelist (Western Church)
» Nativity of the Theotokos (Orthodox Church)
» September 21 (Eastern Orthodox liturgics)
» Public holidays in Armenia or Independence Day, celebrates the independence of Armenia from the Soviet Union in 1991.
» Public holidays in Belize called Independence Day, celebrates the independence of Belize from the United Kingdom in 1981.
» Public holidays in Malta called Independence Day, celebrates the independence of Malta from the United Kingdom in 1964.
» International Day of Peace (International observance named International)