Lost, Season Two

[Desmond is studying the print-out taken from The Pearl]

Locke:
What are you doing?

Desmond:
... When did you come here?

Locke:
What?

Desmond:
The island. When did you come here? How long ago?

Locke:
Sixty, sixty-five days-

Desmond:
What was the date, what was the date?

Locke:
September 22nd. It was September 22nd.

Desmond:
I think I crashed your plane.