August 21st (1986) was a Thursday. It's the 233rd day of the year (234th in leap years) in the Gregorian calendar. There are 132 days left to the end of the year.
Historical Events for 21st August, 1986
» Carbon dioxide gas erupts from volcano or volcanic Lake Nyos in Cameroon, killing up to 1,800 people within a 20-kilometer range.