Lei Day is a festival of the natives of Hawaii, nurtured since time immemorial. a popular part of Hawaiian culture that represents love and unity. The custom of wearing leis originated with the indigenous Hawaiians, who wove necklaces of leaves or ferns or sometimes strung dried shells, fruits, beads, or bright feathers for personal adornment. Hawaiians celebrate Lei Day on May 1, symbolizing their tradition of friendliness.