I thought it was 9pm when we cruised in January, but I could be wrong. We had one night booked for this late and they called our stateroom saying that we could come anytime after 8pm. As we usually averaged about 3 hours a night for dinner there, it was probably best that we didn't show up any later than that. Of the 4 nights we ate there, I don't think we left the restaurant any earlier than 11pm and that was with either a 7:30 or 8pm reservation.