US President Donald Trump is to visit the UK on Friday, 13 July for bilateral talks with Prime Minister Theresa May.
It will not be the full-blown state visit Mr Trump was promised when Mrs May visited the White House in January last year.
But an invitation to a state visit remains open, the BBC understands.
A Downing Street spokesman said “further details” of Mr Trump’s “working visit” in July would be “set out in due course”.
Downing Street and the White House had hoped to co-ordinate releasing details of the trip, but Mr Trump’s spokeswoman Sarah Sanders apparently let slip the information first.
UK ambassador Sir Kim Darroch confirmed the date on Twitter, saying he was “delighted” that Mr Trump would visit the UK.
Mr Trump cancelled a planned trip to London to open the new US embassy in Vauxhall earlier this year, complaining the move to an “off location” south of the Thames had been a “bad deal”.
But critics said his decision may have been driven by a fear of protests.
Reacting to the announcement of his July visit, Kate Allen, Amnesty International UK’s director, said: “When Donald Trump arrives on these shores, we and thousands of our supporters will very definitely be making our voices heard.”