So both baking that one bread and discussing thing with you had me thinking on the problem and a possible solution.
One thing I noticed previously was advertising for "Graveyard Bakers". The name itself has a negative connotation for many "Ugh late night"…except that isn't the case if you specify "Bakers Needed in XYZ timezone". When you say Graveyard Baker my mind automatically thinks 12:00-8:00 Pacific.
Perhaps next time you advertise class and call for recruitment of bakers pic(s) related would help a person visualize.
Could add class times to the bottom.