static public CycConstant lookupSeason(final String season) {
    if (season.equals("SU")) {
      return SUMMER;
    } else if (season.equals("SP")) {
      return SPRING;
    } else if (season.equals("FA")) {
      return FALL;
    } else if (season.equals("WI")) {
      return WINTER;
    } else return null;
  }