What day of the week was July 31, 1948?

The day of the week July 31st, 1948 fell on was a Saturday.

At Idlewild Field in New York the New York International Airport (later renamed John F. Kennedy International Airport) is dedicated. USS Nevada (BB-36) is sunk by an aerial torpedo after surviving hits from two atomic bombs (as part of post-war tests) and being used for target practice by three other ships.