It was a Monday.
July 30th, 1927 was a Saturday.
February 21, 1927 was a Monday.
May 13 1927 was a Friday.
On a Monday.
Saturday
Thursday
It was on a Saturday.
January 14, 1927 fell on a Friday.
November 7, 1927 fell on a Monday.
June 29, 1927 fell on a Wednesday.
This depends on the year. July 21st has occurred on every day of the week.
Thursday