Kitty's birthday would have been Thursday, October 13, 1977. This is due to the fact that Red said it was the 13th and they were watching "The Waltons", then "CHiPs", both broadcast on a Thursday night. The only Thursday night that fell on the 13th in 1977 after "CHiPs" debut date of Sept. 15th would have been October 13th. Also to note: The "CHiPs" episode that night was "Moving Violation", "The Waltons" was "The Warrior".
Kitty: "A sandwich is a sandwich, but a Manwich is a meal".
This was the advertising slogan for Hunt's "Manwich" sauce, used to make Sloppy Joe sandwiches and popular in the '70s.
The third time in the series that Michael Kelso (Ashton Kutcher) dresses in drag.
This is the first time we hear Big Rhonda's name mentioned.