I have a friend who was born on Christmas. She never had a birthday party because her family celebrated Christmas in a big way. The year of her 30th birthday her sister-in-law stripped all of the Christmas decorations from her diningroom and put up birthday decorations then closed the frenchdoors to the room. When it was time to eat the meal her sister-in-law openned the doors and said "Surprise".
My own birthday falls on January 3rd so I had a few of those combined gifts though my mum tried to keep them separate. Now I think it's kinda cool that my birthday is one of the 12 days of Christmas.