Questions for Christians about the origins of Easter and Christmas?

I have heard repeatedly that many people say Christmas and Easter Santa has its roots in Pagan / Roman Holiday and were replaced by so-called Christian holidays of the Catholic Church. To my fellow Christians, is the question really make a difference for you in observing these holidays? Or, in your opinion is more important than these vacancies are in our religion? Christians, not the origins of the party really a bit of difference in what God has done for us in terms of these holidays??

Christmas is the day we celebrate the birth of Jesus, our Savior, I know that is not born that day, but nobody really knows what day he was born, only that he was born and then a day dedicated to the celebration of its coming into the world. Gift Giving is good. Money Tree and at home is not observing pagan pagans observe my own beliefs. Easter is a party anymore, I am glad that Jesus died for me and paid for all my sins and the sins of the world, I am glad that God gave his only Son so that I can live forever with my God. Glad that Jesus was resurrected and walked among men before ascending to sit at the right hand of God. Glad that Jesus is alive and well my friend, my brother, my savior, my Lord, my King!

Easter Pagan Origin