No, they have two, if they want them.
I am of Scottish descent and my husband is Puerto Rican of Spanish descent. We celebrate both Christmas and Three Kings Day. I don't want my son not to know it. It's part of who he is because it's part of who his father is. I wish he were bilingual. I also wish that my husband was somewhat more cooperative in this kind of thing. I'm sure there are other things he celebrated as a boy, but he's just not into it. I, on the other hand, am very into our cultures and traditions. Since I don't know a whole lot about Puerto Rican/Spanish culture, I can only go on the little I know and the little he tells me.