The state funeral of Queen Elizabeth II will take place at 11am on Monday 19 September, the Earl Marshal, the Duke of Norfolk has said.
The funeral will be attended by members of the royal family, heads of state and world leaders, and important public figures.
King Charles III confirmed it would be a bank holiday on his accession to the throne.
Under plans codenamed Operation London Bridge, the Queen’s funeral is to take place 10 days after her death.
The day of death is known operationally as D-Day, or D+0, with the funeral held on D+10.
The Queen died on Thursday 8 September, which would traditionally have been D+0, but because her death was announced late in the day at around 6.30pm, plans have shifted by a day in order to allow time for the complex arrangements to be made.
Friday 9 September is therefore now considered D+0, which means the funeral will be held on Monday 19 September.
The Queen’s funeral will take place at Westminster Abbey in central London, with heads of state and significant public figures to be invited to the abbey, which can hold 2,000 people.
After the funeral, the coffin will be taken to St George’s Chapel at Windsor Castle for a committal service - this will involve a selection of prayers.
A private interment service will be held at King George VI memorial chapel at Windsor Castle, where the Queen will be buried.
Both the funeral and committal service will be televised, with the event expected to be watched by millions around the world.
The Cabinet Office previously released a statement which said: “As you would expect a number of organisations will now be making practical preparations including contingency planning for the State Funeral and related events.
“Access to some areas, especially in central London, will be restricted, with road closures and diversions that will cause delays to vehicles and pedestrians.”
Those who wish to lay floral tributes near royal residences in London, Windsor, Edinburgh, Balmoral, Hillsborough Castle and Sandringham are asked to do so only in designated areas as directed by stewards.
The King has approved an order that the day of the Queen’s funeral will be a bank holiday.
At the Accession Council ceremony, Lord President of the Council Penny Mordaunt said: “Drafts of two proclamations. One – appointing the day of Her late Majesty’s state funeral as a bank holiday in England, Wales and Northern Ireland.
“Two – appointing the day of Her late Majesty’s state funeral as a bank holiday in Scotland.
“And of two orders in council, directing the Lord Chancellor to affix the great seal to the proclamations.”
Charles answered: “Approved.”