Four what? [He knew the man couldn't mean four years, so now he wasn't sure what he was talking about.]

It's- [He paused, looking a mix of embarrassed and apologetic for a moment.] Well, I have to admit, my internal clock has stopped operating. I think it may have become corrupted when I was brought here. Which means I can't give you the current date, however the last recorded date I have recorded is the 8th of November, 2038.