As part of the new Wheel of Challenges challenge you need to maintain a streak between July 3rd and August 6th. By attending events this will help if you're running short of local caches, so come along, enjoy the weather and take part in some geochat. There are benches at GZ if you need a seat, hopefully see you there.
Earn the easy souvenir by maintaining a 2 day streak, the medium souvenir by maintaining a 7 day streak and the hard souvenir by maintaining a 28 day streak.