That is when the world will end.
7 seconds sound clip from the Donnie Darko movie soundboard.
You can hear this line at 00:11:50 in the Blu-ray version of the movie.
Quote context
[...]
- Wake up.
- Closer.
- 28 days, 6 hours, 42 minutes 12 seconds.
- That is when the world will end.
- Why?
- Son? Donnie Darko? Donnie Darko.
- What the heck's going on here?
[...]