The King will celebrate his official birthday during the annual parade, Trooping the Colour, on Saturday 14 June.
But given that Charles' birthday actually falls on 14 November, some people may wonder why the monarch marks his birthday twice?
It's all down to a tradition which dates way back to the 18th century, with the monarch having an official birthday (Trooping the Colour) and an unofficial birthday (in Charles' case – 14 November).
Official celebrations to mark the sovereigns' birthday have often been held on a day other than their actual birthday, particularly when the day has not fallen on a day in the summer.
King Edward VII was born on 9 November, but his official birthday was marked throughout his reign in May or June when there was a greater likelihood of good weather for the birthday parade, also known as Trooping the Colour.
Similarly, the late Queen Elizabeth II's birthday was 21 April, but she always celebrated it officially on a Saturday in June.
Trooping the Colour
© Samir Hussein/WireImageWhat is it?
Trooping the Colour is a military ceremony performed by regiments of the British Army to celebrate the official birthday of the British sovereign. While Charles' actual birthday is 14 November, official celebrations always take place in June.
When is it held?
In 2025, it is scheduled for Saturday 14 June.
Where is it held?
Central London, with the procession route travelling from Buckingham Palace to Horse Guards Parade, along The Mall, and back again.
Who attends?
- King Charles III (in recent years, he has participated on horseback).
- Household Division: including the Foot Guards and Household Cavalry.
- Senior royals, such as the Princess Royal and the Prince of Wales often ride on horseback or appear on the palace balcony - like the Princess of Wales
Why is it called Trooping the Colour?
One regiment's colours (flag) are "trooped" (carried) before the monarch. The event ends with an RAF flypast over Buckingham Palace, viewed by the royal gamily from the balcony.
Historical roots:
It dates back to the 17th century and became an annual event to mark the sovereign’s official birthday under King George III in the 18th century.
Official celebrations to mark the sovereigns' birthday have often been held on a day other than their actual birthday, particularly when the day has not fallen on a day in the summer.
Where can I watch it?
The ceremony is broadcast live by the BBC and covered globally.
