You take your girlfriend, Sour Sweet to go see Canterlot City’s Christmas parade. Naturally, she mocks the whole thing.
Also, Derpy seeks the autograph of the parade’s Guest of Honor, Time Turner, star of the Doctor Whooves TV series… and it may only be up to her best friend, Rainbow Dash to make that happen!
( Serves as a follow-up to Riding Into the Future as well, however it's not required reading to enjoy )