all right on the night

Ultimately successful or adequate after having begun, especially in spite of earlier difficulties. A: "Three more people said they can't come on Saturday. This party is going to be a disaster!" B: "Don't worry, sweetie, it'll be all right on the night." He keeps saying it will be all right on the night, but he hasn't done any studying for this exam yet! Dress rehearsal did not go well, so I really hope everything is all right on the night.