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

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

    No argument starts gui.
    Maximum of 99 days.