In the month of May, Sabahans celebrate The Kadazan Harvest Festival. Eventhough it is named after the major indigenous tribe, who form the largest ethnic group in Sabah, the Kadazans, the solemnity is observed by every Sabah native. The Kadazan Harvest Festival is known locally as ‘Tadau Ka’amatan’.

The Kadazans believe in the worship of ancient gods and the existence of five main spirits, namely: Kinoingan, the Almighty God and Creator, Rusad, the spirit of all living things and animals other than man, Koududuvo, the spirit of the living, Tombivo, the ghostly spirit of the dead and Rogon, the evil spirit.

According to popular belief, the spirit of the paddy plant is said to be part of the Kinoingan - commonly known as the Bambaazon, who is revered as the overall creator, an omnipotent source of life and existence. The rice spirit Bambaazon is therefore revered in the rice plant, the rice grain and the cooked rice. Many believe that “Without rice, there is no life”.

During this festival, Sabah natives wear their traditional costumes and enjoy a carnival atmosphere which stretches from daybreak till dawn. ‘Tapai’ or home-made rice wine is served as the speciality for the day. Sabahans are greeted with a special greeting for the harvest festival known as ‘Kopivosian Tadau Ka’amatan’ or ‘Happy Harvest Festival’.

| Hari Raya Puasa | Hari Raya Haji | Prophet Muhammad's Birthday |

| Chinese New Year | Chap Goh Mei | Nine Emperor Gods | Vesak Day |

| Deepavali | Christmas | Easter | Thaiponggal | Thaipusam |

| New Year's Day | Kadazan Harvest | Gawai Dayak |