why do christians celebrate christmas?

You are right. Nowhere in the Bible does it mention Christmas, December 25, or anything like that. We, as Christians, merely celebrate Christmas because it is the time of year that we have set aside to celebrate the coming of our Lord to earth. If you want to get super technical, December 25 was fairly close not to Jesus' birth, but his conception. The Bible gives several hints that can be used in approximating the time of Jesus' birth, outlined very well here: http://www.khouse.org/ene... this helps you! Please enjoy your upcoming holiday season this year, and remember, he is the reason for the season!

Dive Deep!

I celebrate Christmas to reflect on the reason why Jesus was born. Like we celebrate our birthday which includes taking time to reflect on serious issues of life I think Christmas is what Christians do of Jesus birth. It's now clear, I guess, that 25th December is not the birthday of Jesus in actuality. In fact we may never know that. But I don't think there is anything wrong in celebrating Christmas on 25th. The main point is not about getting the right date; the more important thing is on reflecting the purpose behind the birth. No doubt if we get the right date, better. But not getting the right does not mean that the purpose of the birth is meaningless.

There is nowhere in the Bible commanding in favour of Christmas. But there is nothing against it as well. It's like Good Friday or Easter etc. No command is given about such days either.

Same reason they celebrate Easter and go to church on Sunday. The church was infiltrated with pagans who didn't want to give up their celebrations so the church just renamed them with Christian names. I know many times when non Christians come into our church they want to bring their customs with them. It takes a strong church to resist the practices they want to bring with them and I am sure if they had the numbers like the pagan did it would be hard to stand our ground. Now a days there are only a few people who really know how all of these practices got started and only think of them in a religious way. For instance, the steeple on the churches is a pagan relic. We don't think of it as representing what it meant in the pagan church. When we see a steeple we think, "Oh there is a church of God." We don't think, "Oh, there is a pagan church." People wear wedding bands to represent being married. They don't think about that it use to represent being married to Tammuz showing he was their god. So the question is, is it wrong to follow these practices because they were first invented by the pagans in worshiping their gods?