evidence: In 2008, Kosovo also declared independence -- an action Serbia still refuses to recognize. In 2013, Serbia and Kosovo signed the first agreement of principles governing the normalization of relations between the two countries. Additional agreements were reached in 2015 and 2023, but implementation remains incomplete. Serbia has been an official candidate for EU membership since 2012, and President Aleksandar VUCIC has promoted the ambitious goal of Serbia joining the EU by 2025. [...] Independence 5 June 2006 (from the State Union of Serbia and Montenegro); notable earlier dates: 1217 (Serbian Kingdom established); 16 April 1346 (Serbian Empire established); 13 July 1878 (Congress of Berlin recognizes Serbian independence); 1 December 1918 (Kingdom of Serbs, Croats, and Slovenes (Yugoslavia) established) [...] Social Democratic Party of Serbia or SDPS