My parents became JW's when I was 4 but I do remember Christmas, especially at my grandparent's house, and their huge tree. I remember ours too and Mom's Christmas village under the tree, and the bubble lights.
When we stopped celebrating I honestly thought it was because we "didn't believe in it anymore". I didn't see that it was wrong, only that we didn't believe.
I remember very clearly, when I was about 9, getting up on Christmas Eve, after everyone else had gone to bed and looking out the window over the city (we lived in a house on a hill overlooking the city of Seattle) to see if I could see Santa and his sleigh. I didn't stop believing in Santa. I just thought he didn't come to our house anymore
When I was in school, I honestly don't remember having a problem with holidays. I always did the holiday art work, but remember I was in grade school in the 50's. I helped decorate for holidays, right through high school too. In sixth grade, I went to a small school that only had classrooms. No library or gym. My parent's both worked so I couldn't go home when there were holiday activities. When they had the Christmas party, I was there. They did a gift exchange and my teacher bought an extra gift so no one was left out, including me. I couldn't buy a gift, but I could get one.
My teachers and all my friends knew we didn't celebrate Christmas but it was okay. Nobody seemed to care or ridicule. Different times I guess.
In high school, we all had to write a report one year, about how we celebrated Christmas. I wrote about the origins of Christmas and that our family didn't celebrate. I got an "A".