The Ibans were traditionally animist, although the majority are now Christian, many continue to observe both Christian and traditional ceremonies, particularly during marriages or festivals.
Significant festivals include the rice harvesting festival Gawai Dayak, the main festival for the Ibans.Other festivals include the bird festival Gawai Burong and the spirit festival Gawai Antu. The Gawai Dayak festival is celebrated every year on the 1st of June, at the end of the harvest season, to worship the Lord Sempulang Gana. On this day, the Ibans get together to celebrate, often visiting each other.
The Iban traditional dance, the ngajat, is performed accompanied by the taboh and gendang, the Ibans' traditional music.
Pua Kumbu, the Iban traditional cloth, is used to decorate houses.
Tuak, which is originally made of rice, is a wine used to serve guests. Nowadays, there are various kinds of tuak, made with rice alternatives such as sugar cane, ginger and corn.
The Gawai Burong (the bird festival) is held in honour of the war god, Singalang Burong. (Singalang the Bird). This festival is initiated by a notable individual from time to time and hosted by individual longhouses. The Gawai Burong originally honoured warriors, but during more peaceful times evolved into a healing ceremony. The recitation of pantun (traditional chants by poets) is a particularly important aspect of the festival.
For the majority of Ibans who are Christians, some Chrisitian festivals such as Christmas, Good Friday, Easter, and other Christian festivals are also celebrated. Most Ibans are devout Christians and follow the Christian faith strictly. Despite the difference in faiths, Ibans of different faiths do help each other during Gawai and Christmas. Differences in faith is never a problem in the Iban community.The Ibans believe in helping and having fun together.
:: Sumber :: http://en.wikipedia.org/wiki/Iban_people