The Jeffersons
A full list of special holiday episodes
This classic sitcom follows the wealthy and opinionated George Jefferson as he moves his family from Queens to the Upper East Side, facing new challenges and characters along the way.
The show aired 5 Christmas episodes, and 2 Halloween episodes.
Christmas episodes:

Season 3, Episode 12
The Christmas Wedding
Lionel and Jenny's Christmas wedding plans face opposition from George, who disapproves of their minister's religious denomination and skin color.

Season 4, Episode 15
984 W. 124th Street, Apt. 5C
Louise discovers George has been making monthly payments to an address in Harlem.

Season 5, Episode 12
George Finds a Father
During the Christmas holiday, George learns a disturbing secret about his mother from his guardian.

Season 7, Episode 8
All I Want for Christmas
George, dressed as Santa Claus at the Help Center, makes a promise to ten-year-old orphan Billy to fulfill his Christmas wish for a pair of parents.

Season 10, Episode 10
Father Christmas
Louise, Helen and Bentley go caroling while George and Tom decline, saying it's for women. George and Tom bond over Christmas stories about their fathers.
Halloween episodes:

Season 6, Episode 4
Now You See It, Now You Don't: Part 1
On Halloween night, Louise witnesses a man dressed as a rabbit committing murder, turning the evening of dressing up as movie stars into a night of terror.

Season 6, Episode 5
Now You See It, Now You Don't: Part 2
George and friends wait for the costume contest at the bar, but Louise confronts the killer rabbit in her apartment, becoming his next target.