So what is the earliest concert you can remember going to

Super Jam August 1982 REO Speedwagon, Loverboy, .38 Special, Rainbow, and 707. Tickets were like $15. Donnie Van Zant was in a full leg cast and hopped all over the stage the entire show. Loverboy pretty much stole the whole show though.
I remember going to Kiel and seeing , early 70s Montrose , Humble Pie, Camel and a couple other bands . KSHE radio put it on , tickets were $3.95