startFromSunday option does not seem to work

[Former user]

I'm testing out this widget, and love it so far. However, the startFromSunday option seems to take no effect. I am running with this initial code:

<script type="text/javascript">
  jQuery(document).ready(function () {
    jQuery(".responsive-calendar").responsiveCalendar({
      time: '{{ "now"|date("Y-m") }}',
      startFromSunday: true
    });
  });
</script>

OR

<script type="text/javascript">
  jQuery(document).ready(function () {
    jQuery(".responsive-calendar").responsiveCalendar({
      time: '{{ "now"|date("Y-m") }}',
      startFromSunday: 1
    });
  });
</script>

OR

<script type="text/javascript">
  jQuery(document).ready(function () {
    jQuery(".responsive-calendar").responsiveCalendar({
      time: '{{ "now"|date("Y-m") }}',
      startFromSunday: "true"
    });
  });
</script>