    usage: daysgrounded [-option | child+/-days...]

    optional arguments:
      -a, --auto            auto update based on date
      -h, --help            show this help message and exit
      -l, --license         show license
      -V, --version         show version
      child+/-days          eg. t+1 s-1

    No arguments starts GUI (Graphical User Interface).
    Maximum of 99 days.
