We usually see each working royal attend one of the Queen's 3 Buckingham Palace garden parties. Plus, they may host one of their own.
**Queen's Garden' Parties: For many Royals, attendance is often not announced ahead of time, so do expect the usual people, even if they aren't currently listed. **
May
Queen's Garden Party at Buckingham PalaceAttending: Queen,
Queen's Garden Party at Buckingham PalaceAttending: Queen,
Not Forgotten Association Garden PartyAttending: ?
National Trust Garden PartyAttending: ?
Queen's Garden Party at Buckingham PalaceAttending: Queen
[None]
July
Queen's Garden Party at Palace of HolyroodhouseAttending: Queen