Question: do you have to refrigerate croissant dough overnight?
Answer: Long rest: Place the folded dough on the lined baking sheet, cover with plastic wrap or aluminum foil, and refrigerate for 4 hours or overnight. (Up to 24 hours is ok.) ... Shape the croissants: Remove the dough from the refrigerator. On a lightly floured counter, roll the dough out into an 8×20-inch rectangle.