It’s party time at the palace!

Each year,Queen Elizabethhosts up tothree garden partieson the grounds of Buckingham Palace, as well as one at the Palace of Holyroodhouse in Scotland.

But for her first party of the season, the Queen asked sonPrince Charlesto step in as host. The monarch, 93, has been slowly handing over certain royal duties to senior members of the royal family over the past few years. She’s given several of her patronages toPrince William,Prince HarryandKate Middleton, and Charles has begun attending many events in place of his mother. He hosted over 500 engagements in 2018 — more than William and Harry combined.

The Queen has kept up a busy schedule this season, too. She attended the Royal Windsor Horse Show over the weekend and will attend the RHS Chelsea Flower Show next week. She also held a very special meet-and-greet with her newest great-grandson:Archie!

VICTORIA JONES/AFP/Getty

Prince Charles, Prince of Wales

Princess Anne, Prince Charles, Camilla, Duchess of Cornwall.VICTORIA JONES/AFP/Getty

Princess Anne, Princess Royal (L), her brother Britain’s Prince Charles, Prince of Wales

Chris Allerton/ ©️SussexRoyal

Archie Harrison Mountbatten-Windsor

Garden parties have been held at Buckingham Palace since the 1860s as a way to recognize and reward public service.

Prince Charles.REX/Shutterstock

Royals Garden Party

Royals Garden Party

According to the palace, around 27,000 cups of tea are served and 20,000 sandwiches and 20,000 slices of cake are consumed during the event.

Guests also adhere to a dress code. Gentlemen wear morning dress or lounge suits, while women wear day dresses, typically accessorized with hats or fascinators.

source: people.com