Youngest dd finishes on 23rd December and goes back on 6th January, she has her first comp this Sunday and her Christmas festival display on 13th December and another display in another gym on 17th January, she will also be starting her first grades in January. I suspect that they having time off to give them and the coaches a break, haven't heard anything about going on during the Christmas holidays. I should imagine that the elite girls (performance squad) and the young (4-7) development squad will be in during the Christmas holidays at some point. They usually do.
Haven't heard anything about oldest dd, should imagine it will be the same as my youngest.