There's a creative video on You Tube in which Jesus throws himself a birthday party and no one shows up. It's very cheesy. And yet, at the end, when he sat dejectedly against the bounce house all by himself, I felt sad.
Just think, if we believe in him, and that he was actually the real gift that day - then these years since then are the ultimate "days after". Every morning we wake up is another day to feel so relieved he came. Just try the video. And in light of all the present-opening glee, just try not to feel sheepish.