Mr. Ed's birthday is February 28th, 1953. In the opening of this episode is a calendar with the date of the 28th and the month is hard to see. The year is 1962 and he declares he is 9 years old. Wilbur guesses the day to be both Sadie Hawkins Day which is in November and Ground Hog Day which is in February. This is later confirmed when Ed declares he is a Pisces in a later episode.