During the That Luang Festival every October or November, this temple is one of the focal points of the celebrations, and Si Muang is fêted as a guardian of the city. On a daily basis, Wat Si Muang attracts crowds of local Buddhists who want to benefit from its ‘good luck’ powers. It is commonly thought that if you pray for something here and simultaneously make a promise, your wish will be granted, providing you return and fulfil your promise.