So what is the earliest concert you can remember going to

I can write a book... First concert was around 1980 and it was triumph never surrender... I can't remember who opened for them..
Metallica at the Roseland theater (1,000 person venue) with Megadeth before they were ever played on the radio.. seen Metallica several times after that...
AC/DC, iron maiden, Luther vandross, Tina Turner and Joe cocker, nine inch nails, Tom petty, Judas priest, REO speedwagon, Lynyrd skynyrd, Billy squier, def leppard, George thorogood and the Delaware destroyers,
Had a lot of backstage passes as my high school girlfriend worked at Tower records and got a lot of concert tickets for us and backstage passes... Met Ronnie James Dio and some others I can't remember... Probably a few handfuls more I can't even remember...