Heet 12 is a Northeastern Thailand or Isaan word for the Central Thai word of Jareet which means custom or tradition. Heet 12 are Northeastern Thailand traditions which are celebrated for each month of the year according to the old Thai calendar. It also means the 12 traditions of the year in central Thailand. The traditional Thai calendar starts with the first month in December which is referred in Isaan as Duan Ai or First month. For every month there will be a monthly tradition of cultural celebration. Most of the traditions held are mainly Buddhist traditions. While, the remaining customs have incorporated Buddhism rituals or concepts for merit making. The many Heet traditions in Northeast Thailand are an important factor that helps preserve the social structure and keep the community together. It also, is a tool for promoting unity within the community by the participation of celebrating the traditions or Boon.
Boon Huan, Boon Khao Jii is celebrated during Duan Sam (February). During this period villagers will offer grilled sticky rice cakes and rice harvest gathered from the community to monks. The offering of collective rice harvest is also called Boon Pratai Khao Pluek.
Also the full moon of the 3rd Lunar month marks the occasion of Magha Puja
Māgha Pūjā day marks the four auspicious occasions, which happened nine months after the Enlightenment of the Buddha at Veḷuvana Bamboo Grove, near Rājagaha in Northern India. On that occasion, as recorded in the commentary four events occurred:
1. There were 1,250 Sangha followers, that came to see the Buddha that evening without any schedule.
2. All of them were Arhantas, the Enlightened One, and all of them were ordained by the Buddha himself.
3. The Buddha gave those Arhantas principles of the Buddhism, called "The ovadhapatimokha". Those principles are: - To cease from all evil,- To do what is good,- To cleanse one's mind;
4. it was the full-moon day.
The Buddha gave an important teaching to the assembled monks on that day 2,500 years ago called the 'Ovādapātimokha' which laid down the principles of the Buddhist teachings. In Thailand, this teaching has been dubbed the 'Heart of Buddhism'.
In That Phanom , Nakhon Phanom provice 1000s of bhikkhus and 100s of 1000s of people gather to observe the occasion