This character was "fully functional"
This human holiday was represented in Star Trek: Generations
Christmas
Episode of TOS where a Christmas party and some shenanigans are mentioned...
Dagger of the Mind
This episode has the melding of two families
You are Cordially Invited (DS9)
Q provides Data with this special gift
laughter
Scavenger turned Ambassador
Neelix
This holiday meal favorite was mentioned in an episode of Star Trek
Turkey
A Hallmark Star Trek ornament appeared in this Voyager episode
Death Wish
Two brothers fight, but both find healing
Family (TNG)
McCoy gives Admiral Picard these two gifts for his birthday
Romulan Ale and eyeglasses
Vulcan Ambassador that negotiated the Legaran treaty of 2273
Sarek
This Hindu festival was mentioned in an episode of Star Trek: The Next Generation
Diwali, or the Festival of Lights
The episode where Data plays Scrooge
Devil's Due
This episode demonstrates the timeless love of father and son through the tale of one writer
The Visitor (DS9)
Data presents Worf this gift for his birthday
A painting of the Battle of Ha'ros
Visitor from the Gamma Quadrant who peddled games
Falow
This new holiday was revealed on Star Trek: Picard's season 3
Frontier Day
This episode features the Discovery "family" getting together for a festive meal
Forget Me Not
Meeting Spock's family for the first time
Journey to Babel
Jadzia Dax presents this gift to Commander Worf
a favorite Klingon opera songs
This transport captain had a transparent skull
Captain Boday (DS9)
This is a traditional Risian holiday
Lohlunat
This episode of DS9 has Ben Sisko inviting his officers over for Thanksgiving dinner
Blaze of Glory
This episode of Discovery leans into the concept of "found family"
Magic to Make the Sanest Man Go Mad
Tuvok grants Neelix this parting gift
He dances for Neelix