Yesterday my air condition would turn on, but wouldn't blow air. Today it works just fine

More info need to help very much. Do you have a split system or a package unit (everything in one cabnet)
Your evaporater might have been frozen up and air couldn`t get blown through,then overnight with less usage the ice melted and allowed air to flow better.watch it close if it happens again it needs to be checked out by a pro

This is my answer