<script type="text/javascript" charset="utf-8">
  $(document).ready(function(){  
    // Disable weekends
    $('#answer{SGQ}_datetimepicker').data('DateTimePicker').daysOfWeekDisabled([0,6]);
    // Disable holidays
    $('#answer{SGQ}_datetimepicker').data('DateTimePicker').disabledDates(['04-09-2017', '09-10-2017', '25-12-2017', '26-12-2017', '01-01-2018']);
  });
</script>

<script type="text/javascript" charset="utf-8">
  $(document).ready(function(){  
    // Disable weekends
    $('#answer{SGQ}_datetimepicker').data('DateTimePicker').daysOfWeekDisabled([0,6]);
 
    // Disable holidays
    var holidays = ['19-02-2018', '30-03-2018', '21-05-2018', '30-09-2018', '08-10-2018'] // Variable holidays
    var futureYears = 3; // Number of years to handle future fixed holidays
    var thisYear = new Date().getFullYear();
    for (i = 0; i < (futureYears+1); i++) {
      holidays.push('01-01-'+(thisYear+i)); // New Years
      holidays.push('25-12-'+(thisYear+i)); // Christmas
      holidays.push('26-12-'+(thisYear+i)); // Boxing Day
    } 
    $('#answer{SGQ}_datetimepicker').data('DateTimePicker').disabledDates(holidays);
  });
</script>