We're not sure, but it's probably because the baristas are secretly trying to bribe us with discounts on Monday.
Or maybe it's because they're trying to distract us from the fact that the coffee machine broke on Sunday.
Or possibly it's just because the owner is having a midlife crisis and decided to put up a sale to prove to himself he's still cool.
What to Do When the Cafe Sale is Over Why the Cafe Owner Needs a Vacation