On September 21, 1939, WJSV, an AM radio station in Washington, D.C., recorded the entire 19 hours of its broadcast day. The CBS affiliate picked that day in large part because of the address Franklin D. Roosevelt delivered to Congress. The other big news story of the day concerns the assassination of the Romanian premier. Along with the news coverage, the station ran the standard stream of music, soap operas, sports, and other programming. WJSV broadcasted from a transmitter in Wheaton, MD, on 1460kc (now 1500kc) with a 50,000 watt signal.
On this site, we've provided some information about each of the day's programming. We've also included some audio files (expect the rest to be added in the future). You'll need Quicktime to listen to these files.