The festival is observed in the first week of September every year. After toiling for several months during the year and when the crops are reaped for harvest, the green signal to start the celebration of AMONGMONG festival is given by the village priest called “BEBURU” with due prayers and rites. At the death of the night the priest will announce / proclaim the “ZANGNYOU MONGMONG NUNG EH-LEHE”. The next morning another priest will read the proclamation. Then the villagers will being preparation for the festival by accumulating food stuff, firewood and special wine like ROHI and MADHU. The announcement donate the separation of the spirit of the dead from the living during AMONGMONG festival. Also nobody would like to inherit the sin of the dead and any kind of sinful deeds. Thus throughout AMONGMONG festival, a line is drawn between the dead and the living.

AMONGMONG festival which mean togetherness forever, is very cautiously observed every year and stretched over six days. The object is to have a good harvest, food grains for which the villager have toiled for throughout the whole year. The figure “6” also bear a great significance among the forefathers as the figure “7” was among the Hebrews. For example, when a man brings an enemies head from war. He keeps himself undefiled and observe genna for 6 days . A male baby is christened on the 6th day. If a man dies the deceased’s family would mourn for 6 days.

Each day of the festival has got its own significance. Thus the first day, that is September 1 is called “SINGKITHSA”. This day is marked by the closing of all transaction relating to purchase of domestic animals like pigs, cow, Mithuns and roping them. Beside preparing and collecting of food stuff the villagers also engage themselves in collection of firewood and vegetables and millets from the old fields. While colleting the firewood and water continuous on the second day, the roped domestic animals are also killed. After setting aside some portion for the feast, the meat is distributed among the team members of the group called “ATHIRÜ” and “AKHINGRÜ”. This male and female groups are organized according to the age group primarily for working together in the field of every member of the team in turn.

 During AMONGMONG festival, special meal are arranged in the house of the treasurer of the respective group / team. On the other hand the meat of animals killed by rich individuals is generally shared among relatives, neighbours and friends. The day is called “SINKITHSA”. The third day is “MÜSÜYANGTAP” – day of worshipping the three oven stones by one and all In the early morning of the third day of celebration, the oldest woman of the household perform the ritual by placing gum rice shaped into balls on the top of the three stones and pouring little wine on these stones believing that the god (LIJABA) is represented by these stone. Until the ritual is completed, nobody in the house is allowed to taste food and even animals are not fed. This performance normally takes a short time only. But great care is taken during the ritual lest it is eaten up by some domestic animals which is believed to be the sign of some misfortune or wrath of the Devil.

On these three days villagers will neither go to fields nor outside the village as according to the belief this action would bring calamities and also damage the crops. Again at dawn, the priest would go to the village well and first draw water very carefully. This would be followed by other people waiting there. But each one of them must cover his/her head with green leaves. Lest he or she is attacked by cholera. The day is celebrated with children playing among themselves with gay dresses and the young people in their festive best gather in the dormitory and exchange songs of bravery. In course of time. There are usually joined by their girlfriends. The whole day is devoted to drinking of rice beers, dancing, tug of war and other merrymaking activities.

The fourth day is called KIKHA-LANGPI. The male population of the village would give a face-lift to the village. Here again, the priest will first start clearing the weeds which is followed by all other villagers. Path leading to the fields, inter-village roads, village wells and springs are cleaned. On returning home every grown-up male member will contribute meat and wine and feast together in the house of the village priest. There they re-affirm mutual friendship. In short, it is a day of special gathering and feasting. The wife of the house puts chilies, ginger and cotton in green leaves called “TSIDONG” and put them in the field or outside the village., as according to the belief this action would ward off calamities and prevent damage of crops.

The fifth day is called “SHILANG WUBA NYUNONG”. On this day the villager pay visit to relatives, friends and neighboring villages, sharing of meal, drinking and exchange of gifts in the form of meat take place. The last day of the festival is called “AKATISINGKITHSA”. From this day harvesting starts. On successful completion of the 6th day celebration of AMONGMONG the Sangtam tribe believe that their god is well pleased and hope for blessing from him to have rich harvest and good health in the family.