How many days until Brexit?

The UK was due to leave the EU on 31st October 2019 however the EU have now agreed a variable extension to Article 50 to delay Brexit.
Therefore, currently Brexit will happen on (or before) 31st January 2020 If the UK parliament agrees the exit Brexit before this date Brexit will happen on the 1st day of the following month.

Previously - The UK was due to leave the EU on 29th March 2019 however the UK and EU have now agreed a variable extension to Article 50 to delay Brexit.

Therefore, currently Brexit will happen on (or before) 31st October 2019. If the UK parliament agrees the exit Brexit before this date Brexit will happen on the 1st day of the following month.

Previously - If the prime minister can get her withdrawal deal through Parliament next week, that date will be pushed back to 22 May to give time to pass the necessary legislation.

If the prime minister can't get the deal through, the UK will have to propose a way forward by 12 April for EU leaders to consider.

Previously - In a referendum on 23 June 2016, a majority of British voters supported leaving the EU. On 29 March 2017, the UK government invoked Article 50 of the Treaty on European Union. Absent agreement to the contrary, the United Kingdom would leave the EU on 29 March 2019 at midnight Central European Time.

Read more at Wikipedia https://en.wikipedia.org/wiki/Brexit