The government is an absolute monarchy, the last of its kind in Africa, and has been ruled by King Mswati III since 1986. Elections are held every five years to determine the House of Assembly and the Senate majority. The current constitution was adopted in 2005. ''Umhlanga'', the reed dance held in August/September, and ''incwala'', the kingship dance held in December/January, are the nation's most important events.