Not me, but Wiki knows:

The Torch Festival or Fire Festival is one of the main holidays of the Yi people of southwest China, and is also celebrated by other ethnic groups of the region. It is celebrated on the 24th or 25th day of the sixth month of the Yi calendar, corresponding to August in the Gregorian calendar. It commemorates the legendary wrestler Atilaba, who drove away a plague of locusts using torches made from pine trees. Since 1993, the government of the Liangshan Yi Autonomous Prefecture in Sichuan has sponsored a modernised celebration of the festival, featuring wrestling, horse racing, dance shows, and a beauty contest.