Holidays in the Star Trek Universe

As 21st Century Earth approaches the festive season, the trio ask - what are the holidays of the Star Trek future?

Throughout many series, we have seen small references to our current holidays. How are they celebrated by Starfleet personnel? Has the meaning changed? And outside of Terran culture - what holidays have we seen on screen? And what others must also exist?

Join us in a celebration of holidays past, holidays present, and holidays yet to come!