Just when we thought we’d covered every anniversary this week, Prince Charles and Camilla Parker Bowles surprised us with festivities of their own.

However, unlike the others (Priyanka Chopra and Nick Jonas, for example), these two aren’t marking their relationship. Instead, they are celebrating the “10+1” anniversary of the Duke of Cornwall’s Countryside Fund. The organization, which was founded by the Prince of Wales back in 2010, is the only U.K.-wide charity that empowers family farms and rural communities to ensure their future.

To mark the special occasion and to launch the fund’s new Confident Rural Communities network, the Duke and Duchess of Cornwall attended a reception at the Duchy of Cornwall Nursery. Per the official Clarence House Instagram page, the initiative will bring together over 300 rural community organizations who have benefited from the charity’s program since its inception.