Possible to make "days" run from 5am to 5am rather than from 12am to 12am?

The hours that I am awake are from approximately 4am to 12pm. I would like to schedule things from 11pm to 1am, for example, and that means that the event is split up between two days. This makes it difficult for me to see my whole day in one glance. Is there some programming code that would allow me to change the hours so that my "day" fits into one calendar day?