So, the evening of the day actually begins the night before.  You can begin the day the day before. 

Yesterday we were examing the world clock on a cell phone.  If you were in London right now you would be ahead of time.  Add to that that the sun is setting and you would already be in the next day while you are still in today.  Either you had a great Christmas, are about to have one, or will get in on two Christmases!

If you followed that you are either brilliant, ahead of your times, or . . .