It was the first time this happened in 50+ years. Queen Elizabeth II For a historical event, you will not be able to attend.

Just one day before the May 10 State Opening of Parliament is set to take place—a ceremony in which the Queen would normally attend—Buckingham Palace announced in a statement that the 96-year-old monarch will have to miss the annual occasion.

The statement stated that “The Queen still experiences episodic mobility issues and has decided, after consulting with her doctors, to not attend tomorrow’s State Opening of Parliament.” Referring specifically to her oldest son Prince CharlesAnd the eldest Grandson Prince William, it continued, “At Her Majesty’s request, and with the agreement of the relevant authorities, The Prince of Wales will read The Queen’s speech on Her Majesty’s behalf, with The Duke of Cambridge also in attendance.”

The significance of this event is that Queen Elizabeth opens Parliament every year at the ceremony by delivering a speech outlining the government’s agenda and the proposed laws.