If you find astronomy to be of any interest, then this is a pretty cool site: Sky and Telescope.com.
Scroll down to see a section called "Interactive Observing Tools". The "Moon Phases" option has a utility where you can see the phase of the moon for any date between 4000 B.C. and 8000 A.D.
Other stuff, too.
As someone once told me: Hey, if you're going to stare aimlessly out the window, you might as well know what you're looking at.
[Pic (c) Marvel Comics Group]