https://www.12thnight.atlantia.sca.org/ is the link for all things 12th night.
From the Kingdom Chatelaine:
New to the SCA or Atlantia, join us for Their Royal Majesties Court during 12th night! We will explain the goings-on, the awards, and the traditions taking place. We look forward to meeting you! This Saturday, January 15, the room opens at 11:30 am for Noon Court!