From The Carpenters at the white house to Elvis marrying Priscilla it was a pretty big day in musical History. I'll focus instead on the following fact. On this day in 1976 Led Zeppelin began a two week run at No.1 on the US album charts with "Presence", their fifth number one album by then.
I'd post a few songs off the album but the the ten plus minutes of "Achilles Last Stand" ought to be enough. I couldn't find a live video link for that year so here's the original release.