Assimilating rainy day with one day of the waning moon in eight years, if not twice a month 8 will match the waning days of the first lunar month, eight days after the end of the 15th lunar month 12.
The เขั made of match day hotel one night the moon). If any year a month 8 twice will match the waning days 1 night month became after the end of the day, 15th Moon month 12