You have no obligation to perform any religious observation that you do not believe in, and you are smart to avoid offending others.
I agree 100%.
Do you hold any religious beliefs, if I may ask?
I am open to the idea of a creator, in the sense of Aquinas’s “prime mover” (although I find several flaws in Tommasso’s actual theory), but can neither prove nor disprove it. I do not believe in a god/gods that “intervene” in the affairs of men.