What's the festival in solve riddles on the lanterns?

Lantern Festival. Solve riddles on the lanterns, also called playing riddles, is a traditional activity of the Lantern Festival. Lantern riddles originated from riddles in the Spring and Autumn Period and the Warring States Period. Lantern riddles hung on lanterns for people to guess and shoot began in the Southern Song Dynasty. Because solve riddles on the lanterns can enlighten wisdom and cater to the festive atmosphere, many people responded. Later, solve riddles on the lanterns gradually became an indispensable program for the Lantern Festival.