User blog comment:Mr. Xemnas/What year does 616 take place?/@comment-2031194-20130404005536/@comment-4651179-20130404201650

Well, with the accepted theory of 4-years-here-1-year-there, from the beginning of the Age of Heroes (Fantastic Four #1), 13 years have passed.

Peter Parker was bitten when he was 15.

He's 28, apparently.