The main holidays and festivals in Taiwan may be divided into two major categories : Festivals are associated with the traditional lunar calendar whereas official holidays are celebrated according to the western calendar. The lunar festivals developed from the customs of China's past, and to the celebrants, these occasions are a time for recalling one's cultural origins and remembering the wisdom of early ages. Such festivals include the Lunar New Year Festival, and Lantern Festival, all symbolic of discarding the old and ushering in the new; the Dragon Boat Festival, a time for warding off evil and strengthening the body; the Ghost Festival, when the outcasts from the underworld are given salvation; the Mid-Autumn Festival a celebration of the full moon and unity of mankind; and Double Ninth Festival is to remember the olders.