Sultan of Johor A few hours before his father's death on 22 January 2010, Tunku Ibrahim was appointed as the Regent of Johor, following medical reports that suggested of Sultan Iskandar's impending demise. Sultan Iskandar died on the same night, and Tunku Ibrahim was installed as the Sultan of Johor the following morning. The Menteri Besar (Chief Minister) of Johor, Abdul Ghani Othman cited that Sultan Ibrahim and immediate members of the royal family will undertake a mourning period of 40 days. During the mourning season, Sultan Ibrahim made his inaugural presence at the Conference of Rulers in February 2010 as the Sultan of Johor. On 30 June 2011, Sultan Ibrahim drove the last train from Tanjong Pagar railway station, having received tuition from Chief Locomotive Inspector Hasnol Azahari Aman of Keretapi Tanah Melayu to enable him to do this. He stated that he wished to do this as his grandfather, Ismail of Johor had opened the causeway between Singapore and Malaya in 1923, and that it was appropriate that he should drive the last train out of the station. He also declared Muar as Johor's new royal capital, replacing Johor Bahru on 5 February 2012. This coincided with the Maulidur Rasul celebrations. Sultan Ibrahim became the first Johor Ruler to celebrate his birthday celebration in Muar on 22 November 2012. He picks the town because it is "rich in history and tradition besides being peaceful, beautiful and progressive". He wanted the state government to gazette all the old buildings in the town as a state heritage. He also wants the local authorities to preserve the cleanliness of Sungai Muar which could be done by relocating the bus and taxi terminals elsewhere. He was crowned as the Sultan of Johor on 23 March 2015. The last coronation was that of his grandfather Sultan Ismail on 10 February 1960. From 2015 onwards, 23 March is made an annual state public holiday as the Sultan's official birthday, replacing the public holiday on 22 November, the Sultan's actual birthday. He is noted for his religious moderation and has condemned the creeping Arabisation of Malaysian Muslim culture. Despite being the only Sultan in Malaysia without tertiary (postsecondary) education, he has promoted quality education for Johor. Marriage and issue Sultan Ibrahim married Her Majesty Raja Zarith Sofia, daughter of Sultan Idris Shah II of Perak, in 1982. They have six children: Tunku Ismail Idris Abdul