Re: 7X05 The Angels Take Manhattan (Grading/Discussion) (SPOILERS!)
what with Rory's Nurse badge stating he became one in 1991,
Moffat himself has stated that he never bothered to look at Rory's badge since it had no plot relevance, and thus the date it gave went completely overlooked.
"Internet message boards aren't as funny today as they were ten years ago. I've stopped reading new posts." -The Simpsons 20th anniversary special.