King Charles celebrated his 74th birthday on November 14, but he will also celebrate another birthday like the late Queen Elizabeth II, continuing a 250-year-old tradition.
It is known that the Queen has two birthdays, her actual birthday is in April and her official birthday is in June.
According to tradition, the Queen's official birthday is a military parade in central London, which was first introduced in 1748.
Charles will continue this tradition, which dates back hundreds of years, but he could celebrate his second birthday starting next June.
According to the Mirror, this was because between 1901 and 1910, King Edward VII chose to postpone the parade until June. His birthday is also in November, and he thinks June is good weather and more suitable for celebrations.
When Prince William succeeds to the throne in the future, he may only celebrate once, as George V's birthday is in June, so it's perfect for sunny celebrations.
The Prince of Wales' big day is June 21. The next heir to the throne, Prince George, was also a baby born in the summer, so the tradition could disappear for decades.
Every June, more than 1,400 soldiers, 200 war horses and 400 musicians take part in the Royal Parade, which commemorates the official birthday of the British monarch with military precision, riding and grand celebrations.
The procession begins at Buckingham Palace and follows the boulevard to the Imperial Horse Guards Parade Ground, alongside members of the royal family on horseback or in carriages.
The exhibition ends with a Royal Air Force air show watched from the balcony of Buckingham Palace.
King Charles' coronation, which will take place on May 6 next year, is said to be a ceremony "rooted in tradition" but "future-oriented". We will see the king crowned together with his queen Camilla.