private inner class InstituteDateCallback(val type: Int): DatePickerDialog.OnDateSetListener {
        override fun onDateSet(view: DatePicker?, year: Int, month: Int, dayOfMonth: Int) {
            val cal = GpaCalcFirebaseUtils.getCalendarWithNoTime(year, month, dayOfMonth)
            if (type == START_INSTITUTE) startTime = cal.timeInMillis
            else endTime = cal.timeInMillis