iTunes Connect says:
Make sure your apps are up-to-date and ready for the winter holidays. New apps and app updates will not be accepted December 23 to 27 (Pacific Time), so any releases should be submitted, approved, and scheduled in advance. Other iTunes Connect and developer account features will remain available.
If I have the app already approved by Apple before the deadline, can I still release it on Christmas if I use the "manual release" or "automatically release no later than" option?