Now take it a step further and think one if the problems I ran into when working on MeNomNom about the hours of operation for bars/night clubs. They might list their hours as Mon-Thur 6pm-1am, Fri-Sat 6pm-3am. That's also how people expect to view the hours, but the fact is that it is incorrect. The actual hours (That I had to store in the DB) were more like Monday 6pm-11:59:59pm, Tuesday 0:00:00am to 3am, Tuesday 6pm-11:59:59pm. Human representations of time are so wonky! People seem to have an intrinsic sense that another day doesn't start until they sleep.