Amen - the day isn't important. The wonderful gift of payment in full for our sins via a perfect and loving sacrifice is why we celebrate the events of both the birth and the resurrection. All those who try to divert things, by pointing out that we don't know the exact days, are up to is trying to "nuance" the greatest event for Mankind since God put us here out of existence. That's like trying to destroy Israel - it won't happen because He says so.
Merry Christmas