The first president of Somalia was Aden Abdullah Osman Daar, one of the leaders of the Somali Youth League (SYL), who took office on 1 July 1960, the day on which Somalia was declared a republic. Since then the office has been held by seven further people: Abdirashid Ali Shermarke, Mohamed Siad Barre, Ali Mahdi, Abdiqasim Salad, Abdullahi Yusuf, Sharif Sheikh Ahmed, and Hassan Sheikh Mohamud. In addition, Sheikh Mukhtar acted as president between Shemarke's assassination and the coup d'état, and Aden Madoobe acted as president after Yusuf's resignation in the 2008.