
because he doesn't want to spend
a single DAY without you.
The Big Bang Theory Season 12, Episode 12

Maybe one DAY you'll come up
with a cure for being a dork."
The Big Bang Theory Season 5, Episode 3

Just the other DAY, I discovered
he not only has a loofah, he hides it.
The Big Bang Theory Season 1, Episode 17

spending one DAY
of it without you.
The Big Bang Theory Season 5, Episode 24

I can't prove it's him,
but something craps
on my car every DAY.
The Big Bang Theory Season 12, Episode 7