...and, eventually, it becomes
the so-called Christmas tree.
The Big Bang Theory Season 2, Episode 11
Hey, Sheldon. Are you and Leonard
putting up a Christmas tree?
The Big Bang Theory Season 2, Episode 11
...instead of a tedious
yearly Christmas letter.
The Big Bang Theory Season 3, Episode 17
...and returned the presents
and saved Christmas.
The Big Bang Theory Season 3, Episode 11
Oh, I've decided to write
my own Christmas letter.
The Big Bang Theory Season 11, Episode 11