Originally Posted by Will Dockery
Excellent... if the setting is 1963 then the Bob Dylan at a protest rally makes perfect sense, as this was the height of his "finger pointing songs" like "Blowing In The Wind" and other protest folk songs.
Unfortunately, the last season is set in 1967 since the opening credits feature a New Year's Eve banner that states "1967". Per Penny Marshall's autobiography, one of the bigger issues about the move (she wanted the girls to move to NYC, alone) was the 5 year time jump between season 5 and 6. The time jump is also referenced in the S6 episode "Love Out the Window" when they mentioned Laverne's almost-fiance who died in S5--and they said it was five years earlier.