The Navigator date picker supports RTL (right-to-left) text direction.

JavaScript

Use the rtl property to change the text direction in the Calendar component.

<div id="date-picker"></div>

<script type="text/javascript">
  const datePicker = new DayPilot.Navigator("date-picker", {
    rtl: true,
    // ...
  });
  datePicker.init();
</script>

Demo