- Loy Krathong Day is one of the most popular festivals of Thailand It takes place at a time when the weather is fine as the rainy season is over and there is a high water level all over the country. Loy Krathong day is to ask for apology from the water goddess for having used and sometimes made rivers and canals dirty and is to show gratitude to the Phra Mae Kong Ka or Mother of Water for to wash away the previous year’s misfortunes.