Board Thread:General Discussion/@comment-24757748-20140509034237/@comment-3146930-20140509220428

Eris - Mistress of Chaos wrote: I'm not sure about time on a yearly scale, but in episode 16 Ruby mentions that they use our standard 7-day week which at the very least includes Friday.

Ozpin at least mentions years when explaining how partners would be picked, so I guess years function the same way if there is a 7-day week.