Feast of Fools

From A Wheel of Time Wiki

Feast of Fools is celebrated in Tammaz (in Arad Doman and the Borderlands) or Saven (everywhere else), the exact day varying according to locality. A day in which all order is inverted; the high perform lowly tasks, while the low do no work and give orders to their usual superiors. In many villages and towns the most foolish person is given a title, and for that one day everyone has to obey whatever orders the chosen one gives.

(Note: This holiday is called Foolday in the Two Rivers and in Baerlon.)