Royal highlights of September 2026

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September brings the royal families back into the spotlight after the quieter summer weeks, and this year the month begins with a particularly historic moment in Norway.

From King Haakon VIII taking the Oath of Allegiance to the Constitution to Prinsjesdag in the Netherlands and the opening of the Swedish parliamentary year, September 2026 promises plenty of royal tradition and ceremony.

Here are some of the royal highlights to watch this September.



Royal Diary


September 1st: NOR: His Majesty King Haakon VIII will take the Oath of Allegiance to the Constitution in the Storting Chamber at 1 pm. 

September 1st - September 2nd: BE The King and Queen attend the 22nd informal meeting of the heads of state of the German-speaking countries - The Grand Duke and Grand Duchess of Luxembourg will attend this meeting too. 

royal families Belgium

September 5th: UK: The Braemar Gathering - Held at the Princess Royal and Duke of Fife Memorial Park, this premier Highland Games event features pipe bands, highland dancing, and traditional heavy athletics like caber tossing

September 5th: DK: Flag Day, King Frederik and Queen Mary will attend the national Flag Day for Denmark’s Deployed Personnel. They will participate in commemorative events across Kastellet, Holmens Kirke, and Christiansborg Palace Square.

September 6th: NL: On the occasion of the 100th B-day of Prince Claus, King Willem-Alexander, Former Queen Beatrix and Prince Constantijn of The Netherlands will visit Hitzacker in Germany.

September 6th: MON: Prince Albert II, Princess Charlene, and their twins, Hereditary Prince Jacques and Princess Gabriella, will headline the traditional end-of-summer picnic at Princess Antoinette Park. 

September 7th: SPA: Princess Leonor will formally begin studying Political Science at the Carlos III University of Madrid. 

September 8th: SWE: Opening of the Parliamentary Session - King Carl XVI Gustaf will formally open the new parliamentary year at the Riksdag building in Stockholm

September 9th: NOR: Funeral of King Harald V of Norway. 
Royal non Norwegian guests:
-King Frederik X and Queen Mary of Denmark with  Crown Prince Christian and Princess Benedikte
-King Carl XVI Gustaf and Queen Silvia of Sweden with Crown Princess Victoria and Prince Daniel, Prince Carl Philip and Princess Sofia, Princess Madeleine and Christopher O’Neill, Princess Christina and Tord Magnuson
-The Prince of Wales and the Princess Royal
-King Philippe and Queen Mathilde of Belgium
-King Willem-Alexander and Queen Máxima of the Netherlands with Princess Beatrix and the Princess of Orange
-King Felipe VI and Queen Letizia of Spain with Queen Sofia
-King Abdullah II and Queen Rania of Jordan
-Grand Duke Guillaume and Grand Duchess Stéphanie of Luxembourg with Grand Duke Henri 
-Prince Albert II and Princess Charlene of Monaco
-Hereditary Prince Alois and Hereditary Princess Sophie of Liechtenstein
-Crown Prince Akishino and Crown Princess Kiko of Japan
-Queen Anne-Marie of Greece with Princess Alexia and Prince Nikolaos
-Crown Prince Alexander and Crown Princess Katherine of Serbia
-Prince Kyril and Princess Rosario of Bulgaria

September 11th: NOR: Princess Astrid of Norway passed away at the age of 94.

September 11th: MON: Princess Alexandra of Hanover has announced her engagement to finance Ben Sylvester Strautmann.

September 12th: UK: Last Night of the Proms.

September 14th - September 19th: The Duchess of Edinburgh will visit the Republic of Zambia

September 15th: NL: Prince's Day in The Hague. 

September 16th - September 20th: LUX: The 86th Škoda Tour de Luxembourg cycling race

September 17th: NL: King Willem-Alexander will re-open the castle Huis Bergh in ’s-Heerenberg after extensive restauration works.

royal families Prince of Wales William

Prince of Wales (during the Order of the Garter)


September 17th: UK: The Prince & Princess of Wales will visit the Isle of Bute to highlight the power of community, connection & volunteering, & to celebrate the generosity & dedication of local people who give their time to support & care for fellow islanders

September 18th: JOR: The King and Queen of Jordan are in the Czech Republic for an official visit. 

September 19th: BE: King Philippe will attend Fête de Wallonie in Namur.

September 20th - September 23rd: BE: Queen Mathilde of Belgium will participate in New York on the 81st Session of the United Nations General Assembly.

royal families Belgium Queen Mathilde
Queen Mathilde


September 21st - September 23rd: LUX:  Grand Duke Guillaume will pay a working visit to New York on the occasion of the high-level week of the 81st Session of the United Nations General Assembly. 

September 21st - September 24th: NL: Queen Máxima will attend the 81st United Nations General Assembly in New York. 

September 22nd: UK: The Prince and Princess of Wales will attend the London premiere of Cruise’s upcoming film, Digger. 

September 23rd - 26th: MON: Prince Albert II will provide his official High Patronage to the 35th Monaco Yacht Show at Port Hercule.
Royal destinations Monaco

September 23rd:SAU: National day of the Kingdom of Saudi Arabia. It's a public holiday. 

September 23rd: NOR: Funeral of Princess Astrid of Norway will take place in Oslo.

September 26th: MON: The Grand Ball of Princes and Princesses - Held under the formal High Patronage of Prince Albert II, senior royals are expected to attend this glamorous "Sail into Royalty" themed ball at Sporting Monte-Carlo. The gala serves as a fundraising pillar for the Prince’s chosen pediatric and children-in-care charities

September 29th - September 30th: LUX: A State Visit from Finnland to Luxemburg will take place. 



King Albert and Queen Paola of Belgium

Royal B-Day


September 2nd  – Archduchess Alix of Austria-Este.

September 6th – Archduke Maximilian of Austria-Este.

September 6th - Prince Hisahito of Akishino celebrates his 20th birthday (Japan). 

September 9th – Princess Elisabetta of Belgium, Archduchess of Austria-Este.

September 11th – Queen Paola of Belgium.

September 12th – Princess Iman of Iran.

September 15th – Harry, The Duke of Sussex.

September 15th – Letizia, The Queen of Spain.

September 15th – Prince Daniel of Sweden.

September 17th – Marie-Chantal, The Crown Princess of Greece.

September 21st – Prince Noah of Nassau.

September 22nd – Princess Märtha Louise of Norway.

September 26th – Archduke Alexander of Austria.

September 27th – Princess Iman of Jordan.

September 30th – Princess Marie-Esmeralda of Belgium.

royalcards of September 2026




Royal wedding anniversaries


September 21st – Margaretha, Custodian of The Crown of Romania and Prince Radu of Romania

September 22nd – Prince Lorenz and Princess Astrid of Belgium, The Archduke and Archduchess of Austria-Este.

Prince's Palace of Monaco

Royal exhibitions


September 16th - October 6th: Fleurs de Villes DIANA in Support of The Diana Award in Somerset House. More on this link. 

September 19th - December 13th: Biennale de Lyon in France.

Untill September 26th: MON: "Wedding of the Century" exhibition, at the State Apartments of the Prince's Palace of Monaco.


Royal Books

September '26: India Hicks - Entertaining with a Side of Chaos. 

Royal history


September 7th 1930 - Birth of King Baudouin of Belgium. 


royal collection Belgium Baudouin

September 13, 1598: King Philip II of Spain died at the Escorial and was succeeded by his son, Philip III.


Conclusion

September certainly promises to be a busy royal month, and I will be following many of these events here on All About Royal Families. Which royal event are you most looking forward to? Keep following the blog and my social media channels for royal history, special occasions and new stories throughout the month.

And as always, if you know of an interesting royal event, anniversary or exhibition that deserves a place in the Royal Diary, feel free to let me know.

  

Source pictures: Amazing photographer Bjorn Hoex and pictures I took this year. 



Location: Oslo, Norway

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