The radio program listing indicates the times as "EDT." If the setting were Glendale, California in 193x (it had to be after '33, since that's when Prohibition was repealed), the timetable should have read "PDT," California being one of the only states west of the Mississippi that even practiced DST.
In the end credits the Triple Concerto by Beethoven is identified as Op. 55. It is actually his Op. 56.