The King’s official birthday is set to be marked with the annual Trooping the Colour ceremony, a traditional public parade in London. Multiple outlets report that the colour (regimental flag) to be trooped this year is the King’s Colour of the Grenadier Guards. Trooping the Colour is staged to demonstrate the ceremonial standards of British Army regiments and to celebrate the monarch’s official birthday with public participation and military display. The ceremony features the movement of guards and ceremonial units as the colour is presented and processed during the event. While outlets focus on the specific colour being trooped, the reports do not indicate changes to the broader structure of the annual observance. Overall, coverage converges on the same key point: the King’s official birthday celebrations include Trooping the Colour, with the Grenadier Guards’ King’s Colour serving as the highlight of the parade segment.