What day of the week was March 31, 1906?

The day of the week March 31st, 1906 fell on was a Saturday. There were 15 days until Easter Sunday.

Sin-Itiro Tomonaga the Japanese physicist, Nobel Prize laureate (d. 1979) was born on 31 March in 1906.

The Intercollegiate Athletic Association of the United States (later the National Collegiate Athletic Association) is established to set rules for college sports in the United States.