The card inside the magazine revealed it had been due back 45 years earlier.
"There was no note or anything, just the return," Stephanie George, the branch's head librarian, told CTV News. "I know lots of people are cleaning out their basements and their homes these days because of the extra time, so I'm not sure if it's one of those sorts of things, but it was definitely a treasure."
George said the magazine is still in "pretty good shape."
"It's not completely falling apart or anything," she said. "I think at this time, they were binding the magazines in a different way. Now, we just kind of put them out, but there was a plastic covering on them, and some black tape around the edge, so the cover is still in really good shape."
George said the magazine was likely considered lost and is no longer in the library's system. She said overdue fees for magazines max out at $7, but the library is currently not charging any late fees.