What day of the week was July 4, 1939?

The day of the week July 4th, 1939 fell on was a Tuesday.

Lou Gehrig the recently diagnosed with Amyotrophic lateral sclerosis, informs a crowd at Yankee Stadium that he considered himself "The luckiest man on the face of the earth", then announces his retirement from major league baseball. Huỳnh Phú Sổ founds Hòa Hảo Buddhism.