Although upon further review, I think this might have been the date for adding women in the instrument lines…
Coed Blue Band Set
Pennsylvania Mirror - Saturday, September 22 1973
Annapolis - The 1973 version of the Penn State Marching Blue Band will make its debut at the Penn State-Navy game here Saturday afternoon.
Conducted by James W. Dunlop, the band will for the first time have women in the marching unit. Five women have been chosen through tryouts. There have been 12 majorettes and total personnel including the majorettes, flags, and alternates number 162.
The band will travel by bus to Annapolis, returning at 12:30 a.m. Sunday. They will hold a final rehearsal at Annapolis at 9 Saturday morning.