The instructions are very clear.
Don't feed the gremlins after MIDNIGHT.
The Big Bang Theory Season 3, Episode 4
Good food, good friends,
and sometime around MIDNIGHT...
The Big Bang Theory Season 8, Episode 18
Midnight blue or silver?
Game of Thrones Season 6, Episode 6
A girl and her friends will
walk through the gate at MIDNIGHT.
Game of Thrones Season 2, Episode 8
but I don't know if I can wait
until MIDNIGHT.
The Big Bang Theory Season 11, Episode 11