A Comprehensive Timeline of Brexit

Understanding the Evolution of the United Kingdom's Withdrawal from the European Union

2013

January: Prime Minister David Cameron pledges to hold a referendum on the UK's membership of the EU.

2016

June 23: The UK votes 52% to 48% to leave the EU in a referendum.

July 13: David Cameron resigns as Prime Minister.

July 11: Theresa May becomes Prime Minister.

September 2: May triggers Article 50, beginning the formal process of withdrawal from the EU.

2017

March 29: The UK and EU agree on a two-year transition period after Brexit.

June 8: The Conservative Party loses its majority in the snap general election.

December 8: The UK and EU reach an agreement on the first phase of Brexit negotiations.

2018

July 6: The UK and EU agree on the second phase of Brexit negotiations.

November 13: May survives a vote of no confidence in her government.

2019

January 15: The UK and EU agree on a Brexit deal.

March 12: The UK Parliament rejects the Brexit deal.

March 29: The UK's scheduled date to leave the EU is postponed.

July 24: Boris Johnson becomes Prime Minister.

October 17: The UK Parliament approves Johnson's Brexit deal.

October 31: The UK leaves the EU.

2020

January 1: The Brexit transition period ends.