The Queen's funeral, for which the military will line the streets, will be a bank holiday following approval by the King.
The state funeral for her Majesty the Queen will take place at Westminster Abbey on Monday 19 September at 11:00 UK time.
The bank holiday confirmation came when the King approved an order during a meeting of the Accession Council where he was formally declared Head of State.
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His Majesty's Armed Forces have been at the forefront of Saturday's ceremonies, with gun salutes around the UK.
At St James's Palace, The Band of the Coldstream Guards, alongside eight State Trumpeters from the Household Cavalry, played God Save the King after the proclamation was read out.