The answer is always going to be different for every WDW Resort.
For example at the Boardwalk Inn/Boardwalk Villas Dundy's Sundries is open from 7:00 AM - 9:00 PM. However Screen Door General Store/Thimbles & Threads/Disney's Character Carnival is open from 8:00 AM - 11:00 PM. Even though those three stores have different names they are all connected to each other, so that's why they have the same operating hours.