To Gift and Receive or not

[Blade]

People who believe in the birth of Christ are celebrating Christmas tomorrow. Several years ago I had a friend who was a Jehovah Witness. She didn't celebrate Christmas and would not accept the gifts I had bought her for Christmas. I rewrapped the gifts and gave them to her for her birthday in January.
Had I known she didn't celebrate Christmas I wouldn't have tried to gift her.

My thoughts for this thread are if you are of a denomination that doesn't celebrate the birth of Christ or if you don't believe in God, Jesus etc how do you handle Christmas gifting and receiving? Do you accept gifts from other folks? Do you participate in Christmas functions of others? How do you handle Christmas with the children in your life, especially say if one parent believes and one doesn't? How do you explain to your kids why they have gifts at Mommy's but not a Mommy 2's/Daddy's? Or why Santa doesn't come to your house. What about if you are coupled with someone who celebrates Christmas and you don't?

So the question is how do people who don't beleve in religious celebrations, deal/cope with those in their lives who do? Or as someone who does celebrate are you sensitive to the beliefs/wishes of those you know who don't celebrate? How so?