May 13th (1939) was a Saturday. It's the 133rd day of the year (134th in leap years) in the Gregorian calendar. There are 232 days left to the end of the year.
Historical Events for 13th May, 1939
» The first commercial Frequency Modulation or FM radio station in the United States is launched in Bloomfield, Connecticut. The station later becomes WDRC-FM.