There are a couple of clues to the date of this film:At 2:58 and again at 4:39 we see a wall calendar showing October and the 1st appearing on a Tuesday. 1946 is the only year for this era that works.At 8:15 the girl plots the "last 10 years" of Groundhog Day research starting Feb 2 1937 and ending Feb 2 1946.I believe this film was made during Oct 1946 and released in very late 1946 or early 1947.