the idea that pagans don't have days of importance to those who hold any day, that Christians may hold for a different reason altogether; is somewhat controlling. You bring up Passover now? Nisan 14? or is it the 15? The Passover and Christmas are two different things. Christ-mass has to do with the Advent.
Have a bit of a look: It was not the Passover that Jesus wants to be remembered, now was it? Bringing this up is also to show how Christendom, thus satan had degraded the concepts of Christianity, and the fact of the billions of people that follow along like blind sheep.
It is not my law that people are breaking, it is the Law of the Christ and it is by the Law of the Christ that you are being judged. If I was judging you by my opinion then that would be very wrong of me, however, you are being judged by the Law of Christ, not by me, I just point out where the deviation is occurring.
As loving Christians, we must take care of each other to ensure that we do not stray from the narrow path of Truth onto the wide path of destruction. Isn't that your attitude, your conviction, your concept of the Christian way?