$(document).ready(function(){
    $("#class_meeting_date").datepicker({
        beforeShowDay: $.datepicker.noWeekends,
        altFormat: 'yymmdd',
        altField: "#class_meeting_cymd"
    });

    var current_date = $('#class_meeting_cymd').val();

    if (current_date) {
        $('#class_meeting_date').datepicker('setDate', moment(current_date, 'YYYYMMDD').toDate());
        $('#class_meeting_date').datepicker('update');
    }
});