JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.0/themes/base/jquery-ui.css">
<script src="http://jquery-ui.googlecode.com/svn/tags/latest/ui/minified/i18n/jquery-ui-i18n.min.js"></script>
<input type="date" id="datepicker" value="01.01.2018" />
<script>
$(function() {
  $('#datepicker').datepicker({
       prevText: 'Zur&uuml;ck', prevStatus: '',
		prevJumpText: '&#x3c;&#x3c;', prevJumpStatus: '',
		nextText: 'Vor;', nextStatus: '',
		nextJumpText: '&#x3e;&#x3e;', nextJumpStatus: '',
		currentText: 'heute', currentStatus: '',
		todayText: 'heute', todayStatus: '',
		clearText: '-', clearStatus: '',
		closeText: 'schließen', closeStatus: '',
		monthNames: ['Januar','Februar','M&auml;rz','April','Mai','Juni',
		'Juli','August','September','Oktober','November','Dezember'],
		monthNamesShort: ['Jan','Feb','M&auml;r','Apr','Mai','Jun',
		'Jul','Aug','Sep','Okt','Nov','Dez'],
		dayNames: ['Sonntag','Montag','Dienstag','Mittwoch','Donnerstag','Freitag','Samstag'],
		dayNamesShort: ['So','Mo','Di','Mi','Do','Fr','Sa'],
		dayNamesMin: ['So','Mo','Di','Mi','Do','Fr','Sa'],
      showMonthAfterYear: false,
      showOn: 'both',
      buttonImageOnly: true,
	  minDate: new Date(2018, 1-1, 1),
	  maxDate: new Date(2018, 11, 31),
      dateFormat:'dd.mm.yy'
    } 
  ); 
});
</script>

JavaScript

$(function() {
  $('#datepicker').datepicker({
       prevText: 'Zur&uuml;ck', prevStatus: '',
		prevJumpText: '&#x3c;&#x3c;', prevJumpStatus: '',
		nextText: 'Vor;', nextStatus: '',
		nextJumpText: '&#x3e;&#x3e;', nextJumpStatus: '',
		currentText: 'heute', currentStatus: '',
		todayText: 'heute', todayStatus: '',
		clearText: '-', clearStatus: '',
		closeText: 'schließen', closeStatus: '',
		monthNames: ['Januar','Februar','M&auml;rz','April','Mai','Juni',
		'Juli','August','September','Oktober','November','Dezember'],
		monthNamesShort: ['Jan','Feb','M&auml;r','Apr','Mai','Jun',
		'Jul','Aug','Sep','Okt','Nov','Dez'],
		dayNames: ['Sonntag','Montag','Dienstag','Mittwoch','Donnerstag','Freitag','Samstag'],
		dayNamesShort: ['So','Mo','Di','Mi','Do','Fr','Sa'],
		dayNamesMin: ['So','Mo','Di','Mi','Do','Fr','Sa'],
      showMonthAfterYear: false,
      showOn: 'both',
      buttonImageOnly: true,
	  minDate: new Date(2018, 1-1, 1),
	  maxDate: new Date(2018, 11, 31),
      dateFormat:'dd.mm.yy'
    } 
  );
    
});