How to connect database with bootstrap calendar

 <div class="container">
            <div class="hero-unit">
                <input  type="text" placeholder="click to show datepicker"  id="example1">
            </div>
        </div>

        <!-- Load jQuery and bootstrap datepicker scripts -->
        <script src="js/jquery-1.9.1.min.js"></script>
        <script src="js/bootstrap-datepicker.js"></script>
        <script type="text/javascript">
            // When the document is ready
            $(document).ready(function () {
                
                $('#example1').datepicker({
                    format: "dd/mm/yyyy"
                });  
            
            });
        </script>

"formvalidation.io/examples/bootstrap-datepicker/"
"code.runnable.com/UmOlOZbXvZRqAABU/bootstrap-datepicker-example-text-input-with-specifying-date-format2"

<div class="container">
    <div class="row">
        <div class='col-sm-6'>
            <input type='text' class="form-control" id='datetimepicker4' />
        </div>
        <script type="text/javascript">
            $(function () {
                $('#datetimepicker4').datetimepicker();
            });
        </script>
    </div>
</div>