JOHN STILLWELL/AFP/GETTY
Queen Elizabeth II will celebrate 70 years on the throne next year, a milestone that no other British monarch has achieved. Most of the festivities celebrating this achievement will take place during a four-day extended national holiday in the U.K. starting on June 2, the anniversary of Elizabeth’s coronation at Kicking off with a parade featuring 1,400 soldiers, 200 horses, 400 musicians and an aerial display by the Royal Air Force, activities will include a special service at St Paul’s Cathedral as well as a concert dubbed the “Platinum Party at the Palace,” which will be broadcast live from Buckingham Palace by the BBC. One potential problem looming: whether the Duke of Sussex and his wife Meghan Markle will attend, given the rift between the couple and some members of the royal family and concerns over Prince Harry’s upcoming memoir, which will be published late next year and reportedly has some within the Palace “quaking in their boots.”