question for astronomers

[griz]

Just before dawn this morning I saw the moon.  What was weird was that while I saw the skinny crescent part, I also could see the part that was supposed to be hidden.  The moon was just a little south of where the sun would come up if that matters.  What causes that?  Is it common and I just caught a clear example?

[bedlamite]

Earthshine. It's reflected light from the earth onto the dark side of the moon.

[griz]

Thanks for the quick answer.  I wonder how I got this far without ever hearing the term, but I like it.

[castle key]

Time to play a Pink Floyd song....