But with European Union heads growing increasingly impatient at the political paralysis in Westminster, they could offer just a shorter postponement - or a longer period of up to a year.
Brexit has been delayed but it hasn't stopped new versions of British passports being issued.
The interior ministry said Saturday that a longstanding decision to start introducing passports without reference to the European Union had gone ahead from March 30, the day after the original date for Brexit.
Britain's original withdrawal was scheduled for March 29. The United Kingdom earlier had blue passports until 1988, when the government chose to change the colour to the EU's burgundy red.
Nipsey Hussle Memorial to Be Held Thursday at Staples Center
We just linked for the first time in years and said we were gonna do a new song this summer cause it had been too long. Hussle was expected to be memorialized at the Staples Center, the home of the Lakers, a team he loved.
Susan Hindle Baron, who received her new passport on Friday, posted an update on Twitter with the new travel document, writing that she was "truly appalled" at the change.
It removed the two words from passport covers issued this week on the working assumption that Brexit day would have been 29 March.
In a letter to European council president Donald Tusk, Mrs May asked for an extension until June 30 and agreed to make contingency plans to take part in European Parliament elections on May 23-26 if necessary.
The British Interior Ministry said some individual passports may still bear the words "European Union" on the cover until the remaining stocks are used up.
The other 27 members must give unanimous backing to any extension.
Biggest python EVER: Snake found in Florida Everglades had 73 eggs
Rita Garcia, a spokesperson for the Big Cypress National Preserve, said the eggs were destroyed and the snake was euthanized. The team said it collects data, comes with new removal tools and learns about how the snakes are using the reserve.
The Home Office has confirmed that some passports introduced after March 30 no longer include references to the EU. "Both designs will be equally valid for travel", she said, in quotes published by the BBC.
The new production contract is to begin in October 2019, with the passports now being issued without reference to the European Union on them still in the burgundy colour.
The UK government made a decision in 2017 to change the colour of British passports from burgundy red to dark blue.
Later this year, the passports are set to be changed to blue, as they were before the switch to burgundy back in 1988.
From the end of the year navy blue passports resembling the pre-EU British design are expected to be released.
The Division 2 : Mise à Jour Tidal Basin disponible !
Bien que plus difficiles à compléter, ces activités seront, en cas de succès, plus généreuses en butins et équipements. Dans le cadre de la mise à jour, tous les joueurs auront également accès à une nouvelle carte PVP nommée Fort McNair .