A moon that becomes or appears blue from the surface of its host planet once every ten years on the same date?

This is really just a curiosity question: I wrote a fantasy novel in which the moon appears blue once every ten years on roughly the same date without fail. If anyone asked me why the moon of my world does this, I would just say "because, magic", as magic is already heavily present in the story and there are gods that are very "˜present' (there is no question in the minds of the people whether or not they are merely myth), so handwaving didn't bother me in the slightest.

However, as I've recently become more conscientious about my worldbuilding (though, I don't mind handwaving if it's necessary, I just think it's fun to figure out how certain aspects could've realistically come to be and possibly touch on that in the actual story if I want to), I am curious if this would be realistically possible and, if so, how.

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A moon that becomes or appears blue from the surface of its host planet once every ten years on the same date?

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