Most Chritians know that the date of Dec 25th is not accurate. It is a day to celebrate his birth and most do not care when the actual birthday was.
I also would consider trying to recover from you JW background. I have been going to counseling and found it very helpful. Considering that your problem is a religious one, I would recommend a counselor at a church. My church has a counseling department that offers it for free even. I am very proud of you taking your daughter to church. That took great courage.
Jesus' death is so important to us because that is when he paid the penalty for our sins -- preparing our way to get eternal life. The resurrection is so important because his bodily resurrection is what obviously made him very different from every man who ever lived. His life and ministry was important as well but his death just means the most of anything he did.
Pahpa, you are more than welcomed to continue to not celebrate holidays. I do wish you would do some research to learn why those of us who are still Christians choose to celebrate them.