Datepicker- Week starts on Sunday with Week number

How do I display week starts from Sunday in datepicker along with week numbers.

eg: I need Week starting from 12/03/23(Sunday) should display week number 11 instead of 10. Any help appreciated. thanks

my code:-

<!-- language: lang-js -->

$(document).ready(function() {
  $('.date-picker').datepicker({
    showWeek: true,
    firstDay: 0,
    changeMonth: true,
    changeYear: true,
    showButtonPanel: false,
    dateFormat: 'dd/mm/yy',
    autoclose: true,
  });
});

<!-- language: lang-html -->

<input name="sel-date" id="sel-date" class="date-picker" value="<?= $week_start ?>">

<!-- end snippet -->

You can use the calculateWeek property from the datepicker also you can use beforeShowDay to disable the dates like i have done in the snippet..

let me know

Date Picker on input field:

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

$(function(){
 $('.date-picker').datepicker({   
   showWeek: true,      
   firstDay: 0,
   changeMonth: true,
   changeYear: true,
   showButtonPanel: false,
   dateFormat: 'dd/mm/yy',
   autoclose: true,
   calculateWeek: date => $.datepicker.iso8601Week(new Date(date)) + 1,
   beforeShowDay: function(date) {
     return [date.getDay() === 0,''];
   },  
 });
});

<!-- language: lang-css -->

#ui-datepicker-div { font-size: 12px; } 

<!-- language: lang-html -->

Date Picker on input field: <input name="sel-date" id="sel-date" class="date-picker" value="12/03/2023">


<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>

<!-- end snippet -->

You can use calculateWeek function to change the week number:

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

$('.date-picker').datepicker({
  showWeek: true,
  firstDay: 0,
  changeMonth: true,
  changeYear: true,
  showButtonPanel: false,
  dateFormat: 'dd/mm/yy',
  autoclose: true,
  calculateWeek: date => $.datepicker.iso8601Week(new Date(date)) + 1,
});

<!-- language: lang-html -->

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
Date Picker on input field: <input type="text" name="sel-date" id="sel-date" class="date-picker">

<!-- end snippet -->