I completely agree with jammies and I would definitely do this for any religion to include their holidays and traditions in my daycare. However, I leave the deities out of daycare. We celebrate all the holidays from the child's point of view, just for fun, but not the religious aspects of them. I leave that for the parents because I do not want to influence the children with my beliefs, that's a very personal thing for every family to deal with at home.
I know a caregiver who includes religious lessons, praying, etc. in her daily activities, so she advertises her daycare as Christian and the parents who find that important choose her for that reason. It's important to them.