The Mamas & The Papas "Twelve Thirty" on The Ed Sullivan Show June 1968

 Here

A new label for this band. Another hippy band I like. I don't like all their stuff. Here is the song wiki. It discusses the inspiration behind the lyrics. It also says the song is prominent in the Tarantino movie Once Upon a Time in Hollywood but I don't remember it specifically. This is reckoned to be their last great single.