Brexit (/ˈbrɛksɪt, ˈbrɛɡzɪt/) is the impending withdrawal of the United Kingdom (UK) from the European Union (EU). In a referendum on 23 June 2016, 51.9% of the UK electorate voted to leave the EU. The turnout was 72.2%. On 29 March 2017, the UK government invoked Article 50 of the Treaty on European Union. The European Union (Withdrawal) Act 2018 declares "exit day" to be 29 March 2019 at 11 p.m. UTC.