Thursday.
January 28, 1988 was a Thursday January 28, 1888 was a Saturday
Saturday
28th January 1990 was a Sunday.
January 28th, 1900 was a Sunday.
28th
September 28th 1988 was a Wednesday.
July 28th 1988 was a Thursday.
28th February 1937 was a Sunday.
April, 28th, 1963, was a Sunday.
It was a Friday.
June 28, 1988 fell on a Tuesday.
January 28th 2010 is a Thursday.