Were/are Zen monastery time schedules liberal with regard to meal and dharma talk timing?

When reading Zen Master Dogen's Shobogenzo it attracted my attention that one of the fascicle postscripts said "Presented to the assembly at the hour of the Rat (midnight)". Given that this was happening during Dogen's time in the 13th century, this late dharma talk would have necessitated the burning of lamp oil and the whole monastic assembly being awake to hear the dharma being expounded. I have also heard from other sangha members that some Zen monasteries have a dinner in the early evening (16-17) which would contrast with the Theravada and Tibetan approaches of not having any meals after noon. Are those aspects of the time schedule considered traditional in Zen monastic life? Is there more material on the subject of the practical everyday aspects of Zen monastic conduct that I could read? Both Soto and Rinzai historical as well as contemporary accounts welcome.