Friday June 7th, 1985, as listed below as "OWF" Youngstown to Buffalo.
http://www.al.com/archive/dates1985.html
My introduction to steam locomotives was actually the trip from Youngstown to Pittsburgh the previous weekend (really the day or two after the tornado outbreak on 5/31). I digitized my parent's 8mm film from that trip a few years back, and you can see the tornado damage starting at 2:00. Not sure if it was Saturday or Sunday, maybe some day I'll find my ticket stub that I thought I still had.