The modern definition of festival has four parts: 1. a day or time of religious or other celebration, marked by feasting, ceremonies, or other observances: the festival of Christmas; a Roman festival. 2. a periodic commemoration, anniversary, or celebration: an annual strawberry festival. 3. a period or program of festive activities, cultural events, or entertainment: a music festival. 4. gaiety; revelry; merrymaking. In the later eras of the European Rennaissance (early modern) there was an additional meaning; 5. The marking of important events in the life of a princely dynasty, such as marriage, the birth or christening of an heir, a coronation or a funeral, or the traveling to a new country/ state/ city.
Perhaps those that practice elemental magic begin to take on characteristics associated with their chosen element. For instance, an earth elementalist might be prone to agoraphobia, while air and possibly fire elementalists might have problems with claustrophobia. Water elementalists might always seek the path of least resistance. A fire elementalist might have a cat's opinion of water. This could also apply to physical differences. Fire elementalists might have a freakishly high metabolism and a permanently high body temperature. Water elementalists would probably never get dehydrated, but might slow down a lot when it's cold. Etc, etc.