The nice thing about running your own business is that you can choose any 16 hours out of the day to work. Or not.
One of my favorite "Open for Business" signs is in a little town in Idaho where the owner makes no excuses for deer season. Anybody who wants a small engine repaired or a chainsaw sharpened probably ought to get it done before then or else take the chance that he might just not be there.
Then there is the maple syrup sugarhouse in Vermont where the owner posts this sign, just so everybody knows his hours.