u/DidYouReadTheMenu

"Backstory: The Family Viewing Hour, which was in effect from 1975 through 1977, was mandated by the FCC to have the networks show ONLY family-friendly programming from 8 to 9 PM ET, since there was too much sex and violence on the tube during those hours. (This ruling was rescinded two years later, in 1977.) This ruling forced Norman Lear, creator of "All in the Family," to move the show from its 8 PM Sat. time slot to 9 PM on Monday nights. The cast of "All in the Family" did a little in-house "tribute" to the Family Viewing Hour with their new "1975 version" of the show's opening theme song. This clip never aired; it was only performed live before a studio audience."