To reduce misunderstandings, I'm posting the following response.
Many visitors are unaware that The Holiday Zone is a personal homepage , the work of one person.
It is not a business or an organization. Second, adding additional holidays is time-consuming . Every single holiday on the list reflects somewhere between 50 and 200 hours of work. The Holiday Zone began while I was teaching, and the first materials posted included things I'd used with my own students. I left the classroom just months after The Holiday Zone began, however.