[hifromwork]

Oh, I like that solution! My problem with dates is indeed lack of reproducibility.

The only issue here is that it's not technically monotonic - both commit and author date are changeable:

    $ git init
    Initialized empty Git repository in /tmp/kk/.git/
    $ echo a > a; git add .; git commit -m a
    $ echo b > b; git add .; git commit --date="Wed Feb 16 14:00 2011 +0100" -m b
    $ echo c > c; git add .; GIT_COMMITTER_DATE="Wed Feb 16 14:00 2011 +0100" git commit -m c
    $ git lg
    * 523aa1a - (2024-11-28) c - user (HEAD -> master)
    * cbdbbbe - (2011-02-16) b - user
    * 1055e1e - (2024-11-28) a - user
    $ git show --no-patch --format=%ci HEAD
    2011-02-16 14:00:00 +0100

But I guess if you use a typical pull-request based workflow this won't happen in practice.