The other European Union leaders will meet in Rome on Saturday.
Well now we know - March 29.
Merkel said "it makes absolutely no difference whether the notification comes one day earlier, or three or seven days afterward".
They added: 'We have said we expect this to be a two-year process and we are confident that is what we will achieve'.
A two-year timetable is expected to be followed, meaning Britain's official break with the European Union should occur in March 2019. "A new, positive partnership between the United Kingdom and our friends and allies in the European Union". The remaining 27 leaders are also expected to call an extraordinary summit within four to six weeks.
Controversial penalty lifts Juve
Milan players were furious after the referee gave the home side a spot-kick when he judged Mattia De Sciglio to have handled. Gab Marcotti examines the controversial penalty decision in stoppage time that saw Juventus past AC Milan.
"There is no queue to join the European Union and we have had several voices over recent times saying that if Scotland wanted to be in the EU then there would be a very open warm reception for that", she said.
Commission spokesman Margaritis Schinas said Monday that "we have been informed in advance". The announcement came after May pushed through legislation to start the negotiations to start withdrawal - a process set in motion by voters in a June 23 referendum. Triggering Article 50 of the Treaty means formally notifying fellow members of the intention to withdraw.
Last week, Donald Tusk, President of the European Council, said the EU would not be "intimidated" by threats from Britain that it would prefer to walk away from Brexit talks if it did not get its way.
The UK notified the European Union on Monday of its intention to invoke Article 50 and will now prepare for a lengthy legislative and political program which promises to be anything but clear-cut.
Mrs May says she will not start discussions with the Scottish First Minister on her proposals to hold a second independence vote when she is about to begin Brexit negotiations.