You're missing the point.

[ She shook her head. He really was a grumpy dude, huh. Not celebrating "mortal" celebrations? That was such a lame excuse! ]

It is a day to celebrate, not to affirm. Of course, you could and should celebrate your bond every day... But there is something special in the knowledge myriads people celebrate their love at the same moment. [She raised a finger.] Besides, is making a box of chocolates that difficult?