code: public static CronSchedule monthlyOnDayAndHourAndMinute(int dayOfMonth, int hour, int minute) {
          String expression = String.format("0 %d %d %d * ?", minute, hour, dayOfMonth);
          return of(expression);
      }
docs: Creates cron expression which schedule task execution
  every given day of the month at the given time
  
  @param hour of schedule
  @param minute of schedule
  @param dayOfMonth of schedule
  @return object