Date must be wrong, because it mentions the end of the war and D-Day. Per this date was 1947: https://archive.org/details/DontBeaS1947
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It could refer to the production date:
> It was said to have been produced in 1945, and Paramount Pictures allowed showings for the public "without profit" in 1946. 21st century sources describe a 1943 production and 1947 release instead of 1945 and 1946.
YouTube description says:
> This item was produced or created: 1945