1980 Original Heatwave Thick Stock Concert Poster Elvis Costello Rock MusicAugust 20th, 1980 Heat Wave Concert Poster @ Mosport Park, Toronto Printed on thick cardboard Dimensions: 18. 5" x 24. 25" The owner of Glory Days worked at the original concert and secured the poster personally from the on site backstage show office Heatwave was a rock festival at Mosport Park north of Bowmanville, Ontario, Canada. The slogans used to promote the show were variously the "Punk Woodstock", the "New Wave Woodstock", or "The 1980s Big