I went to all 3 of these in 1978

Day On The Green #3: Aerosmith, Foreigner, Pat Travers, Van Halen, AC/DC (July 23, 1978)
Day On The Green #4: The Rolling Stones, Santana, Eddie Money, Peter Tosh, Toots and the Maytals (July 26, 1978)
Day On The Green #5: Ted Nugent, Blue Öyster Cult, Journey, AC/DC, Cheap Trick (September 2, 1978)

Then I went to these the following year

Day On The Green #1: Boston, Sammy Hagar, Eddie Money, Robert Fleischman (May 6, 1979)
Originally the band UK was scheduled to open, eventually being replaced by Robert Fleischman.
Day On The Green #2: Journey, The J. Geils Band, UFO, Thin Lizzy, Nazareth, The Rockets (July 4, 1979).
Day On The Green #3: Ted Nugent, Aerosmith, AC/DC, Frank Marino & Mahogany Rush, St. Paradise (July 21, 1979).

We moved to Utah at the end of 1979 and I never went to another.