You can have your own name and birthday engraved on a bar. Very handy when your memory starts to crumble. When was I born? Not to worry. Just look at your necklace, provided you can remember your name.
What would be the equivalent piece of jewelry for Fathers Day? I can't think of one, can you?
I've been lucky: sometimes I get flowers for Mothers Day; no one in my family is offended if I forget an important date; no one tries to put a gold rope around my neck.