The Sultan of Selangor’s Birthday is observed in Malaysia every December 11 as a public holiday. This celebration honors the incumbent Sultan of Selangor, who is the head of state in the hereditary constitutional monarchy of Selangor. The current Sultan, Sharafuddin Idris Shah, ascended to the throne in 2001 and was born in December 1945. The Selangor Sultanate has its origins dating back to 1743, evolving into its current form following Malaysia's independence. The Sultan has executive authority and appoints various government officials, including the head of government and members of the legislative assembly. The day typically involves various celebrations and activities to honor the Sultan's contributions to the state.