What actually happened the one time you tried to take a full day off?

I tried it once, turned my phone off for a full Saturday. By Monday there were two client emails nobody had answered, a mix up at the other location that only got caught when a customer complained, and a staff scheduling gap nobody noticed until the shift already started. None of it was a disaster on its own. It was just the sum of a dozen small things I usually catch by being everywhere at once. Curious if anyone here has actually pulled off a real day off from a service or multi location business, and what had to be true for it to work.