I want to translate buttons and formate the date of Date-Picker but the custom js not working for me and show the default setting.

HTML==>

 <div class="md-form">
                        <input dir="rtl" placeholder="التاريخ المحدد" type="text" id="date-picker-exchange" class="form-control datepicker">
                    </div>

js code==>

    $('#date-picker-exchange').pickadate({
today: 'اليوم',
clear: 'اختيار واضح',
        close: 'إلغاء',
formatSubmit: 'yyyy/mm/dd'

});