Merry Dec 25
You know what? You’re right.
If I’m sitting with a big pile of Dec 25 gifts on Dec 25 morning, and I go through them, unwrapping one after the other like so many gizmos on a conveyor belt, I might not appreciate each individual gift as well as I otherwise would if I spread the gifts out over several days or even weeks. Although I cannot deny the magic of sitting by the Dec 25 tree (or in my case, the drawing of it) surrounded by joyous material goods like I did when I was a kid*, receiving a gift on January 3rd would quite possibly make it even more special.
Thus – if your Dec 25 present from me is post-Dec 25, call it “extra love & meaning” not “lazyness and leaving it too late”.