[Ruud-v-A]

Why put the date in the comment itself? Just ask source control when the line was introduced, and set a max age.

[andywaite]

Interesting idea, but I'm not sure if that would be possible for all cases, for example what happens if the part of the line before the comment changed?

[dbuxton]

Fantastic idea and what I thought when I saw this post; I'm slightly surprised that nobody has produced a git one-liner to achieve this yet!