I don’t really have a concrete time in mind for that, personally. It mostly depends on what sort of things people want to do on campus, but the general idea is to skim over more mundane things. Don’t need to write about travelling to the fridge for some food or something, or detailing how you’re following a regular routine with no conflict or interruptions. Because it’s the first day, this one will probably be slightly longer than the average downtime just because things are new. 

Going forward though, not every single day will be so long. There may be days or perhaps even weeks where things are skimmed over once the regular routine is shown, slowing down again once conflict arises or something happens to change the routine.