The Thai Autumn Festival, falling on the last day of the 10th Thai lunar month, roughly corresponding to late September, is a tradition of the Indian culture brought to Siam by Indian priests and has survived to this day, even though the Thais do not have the autumn season. The heart of this custom is that the people make merit by taking the usual food, a small species of banana called kluai khai (egg bananas) and a special kind of sweetmeat called kraya sat to a nearby temple to be offered to the Buddhist monks.
Kraya sat is a mixture of shredded rice grains, popped rice, beans, sesame and coconut meat, ground into meal and boiled with sugar until it is very thick and forms into a sticky cake, then cut into portions.