The death anniversary of Sultan Iskandar of Johor is observed in Malaysia on the 6th of Safar in the Islamic calendar. This public holiday commemorates the memory of Sultan Iskandar, the fourth sultan of modern Johor, who ruled from 1891 to 2010. The observance originated in 1896, initially marking the death anniversary of Sultan Abu Bakar, the founder of the House of Temenggong. Since 2010, the anniversary has been specifically dedicated to Sultan Iskandar, who passed away on January 22, 2010. The remembrance day is marked by a religious ceremony at the Mahmoodiah Royal Mausoleum, where modern sultans of Johor are buried. Attendees include the incumbent Sultan of Johor, family members, and muftis, who participate in prayers, lay flowers on the grave, and sprinkle it with rose water. Unlike the Sultan of Johor's birthday, which follows the Gregorian calendar, this death anniversary shifts annually due to the differences between the Islamic and Gregorian calendars.