Bug#417637: apt: policy: timestamps
$ dlocate -L apt|xargs ls -tdog|sed /^d/d
Shows apt apparently doesn't follow policy:
4.7. Time Stamps
Maintainers should preserve the modification times of the upstream
source files in a package, as far as is reasonably possible.
 The rationale is that there is some information conveyed by knowing
the age of the file, for example, you could recognize that some
documentation is very old by looking at the modification time, so it
would be nice if the modification time of the upstream source would be
At least if a file has not changed, then its timestamp should not look
new, upstream or not.