
...would be
Anything Can Happen Thursday.
The Big Bang Theory Season 2, Episode 20

After the nightmare
of Anything Can Happen Thursday...
The Big Bang Theory Season 2, Episode 20

Thursday nights
I eat pizza from Giacomo's.
The Big Bang Theory Season 2, Episode 6

Oh, they only have Thursday
and Sunday passes left.
The Big Bang Theory Season 7, Episode 14

We'll be going on Thursday because
it's Anything Can Happen Thursday.
The Big Bang Theory Season 2, Episode 20