Exit day was 31 January 2020 at 11.00 p.m. GMT The European Union (Withdrawal) Act 2018 (as amended by a UK Statutory Instrument on 11 April 2019), in section 20 (1), defined 'exit day' as 11:00 p.m. on 31 October 2019. Originally, 'exit day' was defined as 11:00 p.m. on 29 March 2019 GMT (UTC+0).