Remembrance Sunday, which takes place on the second Sunday in November, is a day to remember all those who have died in world wars and other conflicts.
This will be the first Remembrance Sunday without Queen Elizabeth II many will have experienced. Meanwhile, this will be Charles' first Remembrance period as King.
The National Service of Remembrance is held at The Cenotaph in London, which British and Commonwealth soldiers, sailors, airmen and women coming together with the Royal Family to pay tribute.