TV series example of the word

The Big Bang Theory Season 11, Episode 11
Oh, I've decided to write my own Christmas letter.

The Big Bang Theory Season 3, Episode 17
...instead of a tedious yearly Christmas letter.

The Big Bang Theory Season 4, Episode 21
Yeah, every year I get a Christmas card from her signed with too many X's and O's.

The Big Bang Theory Season 12, Episode 18
the broken Christmas tree lights, so it was after that.

The Big Bang Theory Season 10, Episode 12
You know how Sheldon is if he sees Christmas stuff