Monday
August 21st, 1982 fell on a Saturday.
21st June 1933 was a Wednesday.
June 21st, 1976 fell on a Monday.
21st June 1953 fell on a Sunday.
Sunday
It was a Thursday.
It was a Friday.
It was a Thursday.
It was a Tuesday.
April 21st, 1982 fell on a Wednesday.
Sunday (June 21st).
Summer officially starts in the fourth week of June, specifically on June 21st or 22nd. This day is known as the summer solstice, marking the longest day of the year in the Northern Hemisphere.