King Charles III and Queen Camilla will visit the United States from April 27 to April 30, 2023, marking a significant diplomatic event. A highlight will be a garden party at the British ambassador's residence in Washington D.C., where the dress code notably states, “Hats Not Encouraged.” This change breaks from the traditional expectations of royal garden parties, where hats have long been a staple of women's attire. The decision to discourage hats signals a shift towards a more modern approach to royal events. This visit is particularly significant as it is Charles's first state visit since ascending to the throne in 2022, and it coincides with the 250th anniversary of American Independence. The last royal garden party in the U.S. was held in 1939 during King George VI's visit, making this event even more remarkable. Overall, the combination of the relaxed dress code and the historical context of the visit has generated considerable interest.