Wednesday is called hump day because it is the middle day of the traditional Monday through Friday workweek. If you visualize the workweek as a hill with Monday being the base of the upslope and Wednesday being the top of the hill, once you get past Wednesday you are on the downslope side of the hill.
Etymology. The term alludes to the fact that Wednesday is the middle of the work week, meaning that one has made it “over the hump” towards the weekend.
Merriam-Webster Dictionary
Thanks for the memory Nancy.
Hadn’t thought of HUMP DAY since I retired 20 years ago.
We love Hump Day around here!