oh please...Pope Gregory designed the present day calender...do you really think that you can measure seven days from anything.. I think not. The Catholic church wrote the bible, all Christians were Catholic for over 1500 years..pay attention Jesus founded 1 religion, Catholocism..wake up and grasp salvation
The bible was being written eons before Roman Catholicism came onto the scene. In this bible, Jesus Christ created holy days and told those who worship him how to observe them. He caused this to be written down in Leviticus, among other places. When Jesus Christ incarnated, he kept these same holy days that he created. Christmas is not one of those.