Margaret's wedding invitation has the date of November 23, 1963 which is one day after President John F. Kennedy was assassinated
Don passes Gene's bedroom and sees him sitting on the bed getting ready to go to bed. Don says "You're an old Army man. Drop your socks and grab... something", whereupon Gene starts laughing. Don, who was also in the Army, has made a joke based on an ages-old military ritual in which sergeants would wake up their sleeping soldiers in the morning by yelling "Drop your cocks and grab your socks!"
At the lunch with the Madison Square Garden executives, Roger mentions that Kinsey, who angered and highly offended the MSG execs in a previous meeting, "took a Yetta Wallenda-size misstep." Yetta was a member of the famous Wallenda family of trapeze and highwire artists, known as the Flying Wallendas, several of whom met gruesome deaths from falls during their acts. In April, 1963, Yetta Wallenda was performing in Omaha, Nebraska. According to Time magazine, "she apparently fainted at the climax of her solo act atop a swaying fiber glass pole, fell gracefully and silently 50 ft. to the ground". She was 42.
William, Betty's brother, suggests that their father be admitted to "the Parker House, halfway between us and New Brunswick" after his recent strokes and memory loss. The Parker House was a nursing facility since 1907 and well known and respected in the area of central New Jersey.
Peggy is (secretly) an admirer of Ann-Margaret's performance in Bye Bye Birdie (1963). Ann-Margaret's birth name, Ann-Margret Olsson, is quite close to Peggy's given name, Margaret Olson.