When this episode last aired on Thursday, June 6, 1991, it was the last time ever that the "Tomorrow" song was sung on national TV, thus ending a long era.
This was the last time Rogers sang Tomorrow to close a television visit on a semi-regular basis. The next day, Good Feeling would become the permanent end song. However, the Tomorrow song was used in 2 more episodes: Episode 1336 from 1974, and Episode 1459 from 1976. In 1459, it was sang in conjunction with the Good Feeling song, specifically to prepare kids for the bulk reruns.