parse date and report difference of days

as an user, I wish to have an idea if a package was recently update or not. So an useful output could be "package was updated less than 2 weeks ago" or "more than 3 months" and so on. Find out proper way to express the age of the last update

No files, tests, or entry points are named. Start by locating the command or module that reads a package's last-update date and formats its output; inspect the existing date handling, then define and test human-readable age ranges such as weeks and months.

Written by the indexing model from the issue text.