The Melanau calendar (Malay: Bulan Melanau) is a calendar used by the Melanau people of Borneo. Its year consists of 12 months. The first month, Pengejin, signifies the celebration of the Kaul festival (a giving of thanks for the preceding year, with prayers for the year ahead). Each month in the Melanau calendar consists of 30 days. It is guided by the constellations, natural phenomena and guardian spirits. Each month is named for occurrences during the month or events which are supposed to have occurred during that particular month, according to legend. The rise and fall of the Sun, the Moon and the stars determine the time for planting, harvesting, fishing, building, travel and marriage.