The funeral of Baroness Thatcher will take place on Wednesday, 17 April, Downing Street has announced.
The 87-year-old former prime minister died on Monday, after suffering a series of strokes.
The funeral ceremony, with full military honours, will take place at London's St Paul's Cathedral, following a procession from Westminster.
The Queen, accompanied by the Duke of Edinburgh, will attend the service, Buckingham Palace said.
Lady Thatcher will not have a state funeral but will be accorded the same status as Princess Diana and the Queen Mother.
A ceremonial funeral is one rung down from a state funeral - normally reserved for monarchs - and requires the consent of the Queen.
A Downing Street spokesman said the details had been agreed at a "co-ordination meeting" between the Thatcher family and Buckingham Palace on Tuesday morning.
The funeral procession will set out from the Palace of Westminster with Baroness Thatcher's body carried in a hearse for the first part of the journey. The coffin will be trasferred to a gun carriage at the church of St Clement Danes on the Strand.
Baroness Thatcher's body will lie overnight in the Chapel of St Mary Undercroft which is found beneath St Stephen's Hall at the Palace of Westminster.
St Clement Danes
At the RAF Chapel at the church of St Clement Danes on the Strand, Baroness Thatcher's coffin will be borne in procession to St Paul's Cathedral on a gun carriage drawn by six horses of the King's Troop Royal Horse Artillery.
St Paul's Cathedral
There will be a Guard of Honour outside St Paul's as the coffin is transferred into the Cathedral by service personnel from regiments and ships closely associated with the Falklands campaign.
The ceremony in St Paul's Cathedral will be attended by the Queen and Duke of Edinburgh, family and friends of Baroness Thatcher, members of her cabinets and dignitaries from around the world.
The funeral passes Downing Street, which is found on the left of the route along Whitehall.
Baroness Thatcher was resident at Number 10 for more than ten years following her General Election victory in 1979.
Once the procession leaves St Clement Danes, the route to St Paul's along Fleet Street and Ludgate Hill will be lined by more than 700 armed forces personnel from the Royal Navy and Royal Marines, F Company Scots Guards, 1st Battalion Welsh Guards, and the Royal Air Force.
In other developments:
- The Premier League and the Football League say they will not be asking clubs to hold a one-minute silence at forthcoming fixtures but Wigan chairman Sir Dave Whelan criticises the decision
- UK and international leaders continue to pay tribute
- Union leader Len McCluskey calls Thatcherism an "evil creed"
- Several police are injured and arrests are made as violence breaks out at events "celebrating" Lady Thatcher's death
- Former Prime Minister Tony Blair says such parties are
- Northern Ireland Deputy First Minister Martin McGuinness urges people to
Lady Thatcher, a Conservative, was the UK's first female prime minister. She was in office from 1979 to 1990, winning three successive general elections.
She died "peacefully" after suffering a stroke while staying at the Ritz hotel in central London. Lady Thatcher had been staying at the hotel since being discharged from hospital at the end of last year.
An undertaker's van carrying a silver casket left the hotel early on Tuesday morning for an undisclosed location.
Parliament will be recalled from its Easter recess this Wednesday to enable MPs and peers to pay tributes.
But Labour MP John Mann said: "I do not know why we are wasting taxpayers' money on an additional session.
"It is perfectly valid that, when a prime minister dies, MPs can pay tribute, but this could be perfectly properly done on Monday."
However, a large number of Labour MPs are expected to pay tribute to Lady Thatcher, a senior party source said.
Respect MP George Galloway said he would not attend, as genuine debate was "not allowed". He called the event a "state-organised eulogy".
Prime Minister David Cameron has described Lady Thatcher as a "great Briton" and international leaders, including US President Barack Obama and German Chancellor Angela Merkel have praised her global role.
But small gatherings happened on Monday night in various parts of the UK, notably in Glasgow, Bristol and London, with those taking part saying they were celebrating her death.
Seven officers were injured in Bristol, where violence broke out and bins were set alight. One person was arrested on suspicion of violent disorder.
The Metropolitan Police reported low-level disturbances in Brixton, south-east London, including missiles being thrown at police. Two women were arrested on suspicion of burglary after being found inside a shop.
Labour leader Ed Miliband "categorically condemns any celebration of Lady Thatcher's death", a senior party source said.
They added: "As he made clear yesterday she was a huge figure in British politics and on the world stage. While the Labour Party disagrees with much of what she did, we can respect her personal achievements."
But Mr McCluskey, the head of the UK's largest union Unite, told Sky News that "maybe millions celebrated her death" and described Thatcherism - the word used to sum up her philosophy and political beliefs - as an "evil creed".
Unite is one of Labour's largest financial backers.
Lady Thatcher was born Margaret Roberts, the daughter of a shopkeeper and Conservative councillor in Grantham, Lincolnshire, in 1925. She became an MP in 1959.
Having been education secretary, she successfully challenged former Prime Minister Edward Heath for her party's leadership in 1975 and won general elections in 1979, 1983 and 1987.
Lady Thatcher resigned as prime minister in 1990 and had been in poor health for several years prior to her death.