Board Thread:General Discussion/@comment-24757748-20140509034237/@comment-10390252-20140509123751

Earth's calendar is fairly arbritary and is an astronomical coincidence. We have a very large and very obvious moon that goes through its cycle of phases every 28 days. By another coincidence, the Sun makes a full cycle of its southward and northward trek of apex points in about 12 lunar cycles. So, we end up with a year of 12 months.

Remnant has a large moon too. Although there is still some question in my mind about whether it is tidally locked with Remnant or its sun, Monty has confimed that it does have phases. One presumes that the humans of Remnant have a similar system of days, month-like divisions and a year based on the time between winter solstices.

The week is a very arbritary concept that seems to come from several very ancient creation stories (not just the Judeo-Christian one). Without this influence, my guess is that weeks would probably be groups of five or ten days because of the number of fingers on human hands (that's just a guess though).