March 3, 1964.
When Mad World finally ended its run, Cinerama had apparently given up booking three panel Cinerama engagements but that didn't stop them from squeezing some money out of How the West Was Won as a standard release in optically printed anamorphic Panavision. I'm sure more than a few people were extremely disappointed when they showed up at the Rialto to see this greatly downgraded version, especially since the Rialto still had its Cinerama screen! In any case, it only played a few weeks. July 12, 1964.
For Christmas 1964, Emil and the Detectives, a rather minor Disney release was booked. According to IMDB, Billy Wilder helped write the screenplay. December 20, 1964.