Saturday is business as usual.
Easter Sunday is the one other day, other than Christmas Day, when most everything, including tourist attractions, close down. Some convenience stores and pharmacies stay open, but it's random.
Things return to almost normal on Easter Monday when most businesses and banks re-open. Schools, libraries and government offices stay closed - some liquor stores may be open, but check ahead. Public transit runs on a regular schedule.
Best to call ahead to confirm holiday hours.