Holidays in the Realms?

[Nola Vilde]

Seeing Kuroi bringing his version of Holiday cheer to the sereitei brings to mind the question:
What holidays DO the different races celebrate if any?
Is there a Kuchiki festival?
Does Myza celibrate mothers day?
Does Quincy have a day for the emperor?

Just mild curiosity on my part.

[Kyomei Kuchiki]

Hmm..

The Human World dwellers are easy, since they probably celebrate all of the regular holidays we celebrate plus extras. I'd like to believe that there is a yearly Day of the Emperor, but wouldn't every day be Emperor Day in the Vandenreich? They probably also observe a Cinco de Mayo (the real one) like tradition in honor of the Quincy Genocide.

I doubt Arrancar celebrate many holidays, but the Soul Society probably does. Not sure what holidays, though.