Typically, this only occurred to the eve of the complete moon. So the most beneficial time to go to Hoi An was during the full moon. With the development of tourism in Hoi An, this now happens on a nightly foundation, so everyday is the best time to go to! https://martinllnxw.blogchaat.com/39594100/how-hoi-in-an-can-save-you-time-stress-and-money