I am Using

CodePudding user response：

Please try below solution for that.

jQuery('#datetimepicker').datetimepicker({
  datepicker:false,
  format:'H:i',
  allowTimes:[
    '00:00', '01:00', '02:00', '03:00', '04:00', '05:00', '06:00', '07:00','08:00', '09:00', '10:00', '11:00', '12:00', '13:00', '14:00', '15:00', 
    '16:00','17:00', '18:00', '19:00', '20:00', '21:00', '22:00', '23:00'
    ],
});

Hope this is work for you.