(on 1 February). Malaysia Day, held on 16 September, commemorates the formation of Malaysia through the union of Malaya, Singapore, Sabah, and Sarawak, although it is celebrated mainly in East Malaysia. New Year's Day, Chinese New Year, and the start of the Islamic calendar are all public holidays. Muslim holidays are highly prominent in Malaysia. The most important of these is Hari Raya Puasa (also called Hari Raya Aidilfitri), which is the Malay translation of Eid al-Fitr. It is a festival honoured by Muslims worldwide marking the end of Ramadan, the fasting month. They also celebrate Hari Raya Haji (also called Hari Raya Aidiladha, the translation of Eid ul-Adha), Awal Muharram (Islamic New Year) and Maulidur Rasul (Birthday of the Prophet). Malaysian Chinese typically hold the same festivals observed by Chinese around the world. Chinese New Year is the most prominent, lasting for 15 days. Hindus in Malaysia celebrate Deepavali, the festival of light, while Thaipusam is a celebration in which pilgrims from all over the country meet at the Batu Caves. Wesak (Malay for Vesak), the day of Buddha's birth, is a public holiday. Malaysia's Christian community observes most of the holidays observed by Christians elsewhere, most notably Christmas and Easter. Good Friday, however, is only a public holiday in the two Bornean states. The harvest festivals of Gawai in Sarawak and Kaamatan in Sabah are also important for East Malaysians. Despite most of the festivals being identified with a particular ethnic or religious group, festivities are often participated in by all Malaysians. One example of this is the celebration of Kongsi Raya, which is celebrated when Hari Raya Puasa and Chinese New Year coincide. The term Kongsi Raya (which means "sharing the celebration" in Malay) was coined because of the similarity between the word kongsi and the Chinese New Year greeting of Gong xi fa cai. Similarly, the portmanteau Deepa Raya was coined when Hari Raya Puasa and Deepavali coincided. A practice known as "open house" (rumah terbuka) is common during the festivities, especially during Hari Raya Aidilfitri, Deepavali, Chinese New Year, and Christmas. Open house means that all well-wishers are received and that everyone, regardless of background, is invited to attend. Open houses are normally held at the home of the host and foods are prepared by the host. There are also open houses held at larger public venues, especially when hosted by government agencies or corporations.