Here's "first monday of every month" in systemd.time(7) format: $ systemd-analyz...

Here's "first monday of every month" in systemd.time(7) format:

    $ systemd-analyze calendar 'Mon *-*-1..7 10:00'
      Original form: Mon *-*-1..7 10:00
    Normalized form: Mon *-*-01..07 10:00:00
        Next elapse: Mon 2022-10-03 10:00:00 BST
           (in UTC): Mon 2022-10-03 09:00:00 UTC
           From now: 1 week 1 day left

Credit: https://www.redpill-linpro.com/sysadvent/2016/12/07/systemd-...