Set specific TimeZone in jQuery DatePicker Plugin

hello,

i have this jqery multi date selector, it works fine,

it is getting server date, but i want it to work with USA timezone

how to set specifc country time zone in calender

            <link rel="stylesheet" href="https://cdn.rawgit.com/dubrox/Multiple-Dates-Picker-for-jQuery-UI/master/jquery-ui.multidatespicker.css" />
            <link rel="stylesheet" href="https://code.jquery.com/ui/1.12.1/themes/pepper-grinder/jquery-ui.css" />
            <script type="text/javascript" src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
            <script type="text/javascript" src="https://cdn.rawgit.com/dubrox/Multiple-Dates-Picker-for-jQuery-UI/master/jquery-ui.multidatespicker.js"></script>
            <script type="text/javascript">
                $(function () {
                    $('[id*=TextBox1]').multiDatesPicker({
                        dateFormat: 'mm/dd/yy',
                        minDate: 0
                       
                    });
                });
            </script>