Ask him why he doesn't celebrate anything is a good start. If it's important to you and to your child to celebrate things then he should be prepared to give some on the subject, or to at least not be a killjoy if you two do.
My ex was jewish and didn't obviously celebrate christmas, but I did having been brought up a catholic, and our kids either did or didn't celebrate these things as the fancy took them, because we both acknowledged that we had differeing beliefs. If he really is Mr Right then it'll come good, if he's so inflexible that he won't budge on what is a reasonably small point then I think you have to ask yourself why.