docs: protected void applyDateOffset(Calendar calendar, String offsetString) {
          calendar.add(Calendar.YEAR, getDateValueOffset(offsetString, 'y'));
          calendar.add(Calendar.MONTH, getDateValueOffset(offsetString, 'M'));
          calendar.add(Calendar.DAY_OF_YEAR, getDateValueOffset(offsetString, 'd'));
          calendar.add(Calendar.HOUR, getDateValueOffset(offsetString, 'h'));
          calendar.add(Calendar.MINUTE, getDateValueOffset(offsetString, 'm'));
          calendar.add(Calendar.SECOND, getDateValueOffset(offsetString, 's'));
      }