A day off that isn't a day off

I was scheduled a day for a class, but the GM forgot whether it was Tuesday or Thursday. I am pretty sure that would take some hours of my regular schedule, but who knows. I know that I'm paid for it. It would be nice, even if it ate up a day off that I could get a little larger paycheck for one half-day of paid work.

As consolation prizes, it would be clean -- I wouldn't smell like my general work and I would be finished and in town by 4.

I have yet to google calendar it, for I do not yet know the date. That being the case, I have not requested off a day that I was going to ask off, for I have another distant "opportunity" as it were.