The Queen's funeral is to be held on Monday 19 September, Buckingham Palace has announced.
The event will come at the end of an official 10-day period of mourning, after the death of Queen Elizabeth aged 96 on Thursday. It will be held at 11am at Westminster Abbey.
Her son Charles was officially proclaimed King on Saturday, and ordered that the day of his mother's funeral be a bank holiday.
King Charles III confirmed the public holiday during his first meeting with the privy council in St James's Palace - the first in history to be televised.
Related: Charles formally proclaimed King by privy council
The Queen's funeral will be the first state funeral to be held since that of her first prime minister, Sir Winston Churchill, in 1965.
Though her father, George VI, chose St George's Chapel at Windsor Castle for his service, his daughter's body will be taken to Westminster Abbey, where she was married and crowned, and then to Windsor to be interred in the royal vault.