Lanshan district Library. The theme activity "Our Festival Lantern Festival" sponsored by lanshan district Library was held in the Red Study Room of lanshan district Library. It is a very worthwhile place to experience traditional customs and celebrate the Lantern Festival through solve riddles on the lanterns and lanterns. Lantern Festival, also known as Shangyuan Festival, Xiaoyuanyuan Festival, Yuanxi Festival or Lantern Festival, is the 15th day of the first lunar month every year.