This episode takes place in February 1969.
Sally's roommate asks her if this is the first funeral she's ever been to. Sally's behavior problems really started after Grandpa Gene's death - when Don and Betty wouldn't let her go to his funeral.
When Dawn and Shirley meet in the break room, they jokingly address one another by the other's name. This is likely an implication that people confuse them since they're the only African-American women in the agency.
Although credited, January Jones (Betty Francis), Aaron Staton (Ken Cosgrove), Rich Sommer (Harry Crane), Jessica Paré (Megan Draper), Christopher Stanley (Henry Francis) & Mason Cotton (Bobby Draper) do not appear in this episode.