While I have admittedly limited experience, I have never known even of anyone who talked about celebrating Kwanzaa IRL. Like, we learned about it in school for I guess diversity's sake, but I didn't hear one black kid in my school say that they celebrated it. There was no, like, one volunteer to talk about it. I know that the black kids celebrated Christmas and got Christmas presents -- people would talk about that. I know/knew people that celebrated Hannukah and Diwali and Eid.