15 October is a national holiday to commemorate the memory of His Majesty Preah Bat Samdech Preah Norodom Sihanouk - also known as 'The King-Father of Cambodia'.
HRM Norodom Sihanouk (31 October 1922 – 15 October 2012) was the King of Cambodia from 1941 to 1955 and later from 1993 to 2004. He was the effective ruler of Cambodia from 9 November 1953, when Cambodia gained its independence from France, until 18 March 1970. After his second abdication in 2004, he was known as 'The King-Father of Cambodia'.
After a number of health problems, Sihanouk had been receiving medical treatment and passed away after a heart attack in Beijing on 15 October 2012 - 16 days before his 90th birthday.
State flags flew at half-mast, and King Norodom Sihamoni and Cambodian Prime Minister Samdech Hun Sen went to Beijing to bring home Sihanouk's body for a funeral at the Royal Palace in Phnom Penh.
After Sihanouk's passing, national TV channels screened documentaries about his life on repeat and hundreds of thousands of people went to Phnom Penh to show their last respect. It's estimated that more than one million people lined the route from the airport to the Royal Palace in Phnom Penh for the return of Sihanouk's body.
On November 28, 2012, King Father Norodom Sihanouk was anointed by Royal Decree of HM King Norodom Sihamoni with the title Preah Karuna Preah Norodom Sihanouk Preah Borom Ratanakkot meaning The King who lies in the Diamond Urn.