Gawai Dayak is an annual festival celebrated by the Dayak people in Sarawak, Malaysia and West Kalimantan, Indonesia on 31 May and 1 June. It is a public holiday in Sarawak and is both a religious and a social occasion recognised since 1957. The British colonial government refused to recognise Dayak Day until 1962. They called it Sarawak Day for the inclusion of all Sarawakians as a national day, regardless of ethnic origin. On 1 June 1963, Datuk Michael Buma, a Betong native, hosted the celebrations of the first Gawai Dayak at his home at Siol Kandis, Kuching. [1] On 25 September 1964, Sarawak Day was gazetted as a public holiday acknowledging the formation of the Federation of Malaysia. The holiday was first celebrated on 1 June 1965 and it became a symbol of unity, aspiration and hope for the Dayak community. It is an integral part of Dayak social life. Gawai Dayak comes from Gawai meaning festival and Dayak a collective name for the indigenous peoples of Sarawak, Indonesian Kalimantan and the interior of Borneo. The population estimate is two to four million people. The Dayaks, previously known as the Sea Dayak are mostly Iban people. Other ethnic groups such as the Bidayuh people (Land Dayakand Orang Ulu) are recognised. The Orang Ulu include the Kayans, Kenyahs and Lun Bawangs. There are over 200 riverine and hill-dwelling ethnic subgroups in the region. Although these peoples have common traits, each have their own dialect, customs, laws, territory and culture. Dayak languages are categorised as part of the Austronesian languages. The Dayaks embraced animism and paganism but in recent times, many have converted to Christianity