It was a Sunday.
15 April 1978 was a Saturday.
15 August 1978 was a Tuesday.
15 June 1978 was a Thursday.
February 15, 1978 is on a Wednesday
December 15, 1978 fell on a Friday.
July 15, 1978 fell on a Saturday.
15 January 2006 was a Sunday.
15 January 1958 was a Wednesday.
January 15, 1959 was a Thursday.
January 15 1935 was a Tuesday.
January 15, 1929, was a Tuesday.
January 15 2010 was a Friday.