Apple has announced its next Apple Watch Activity Challenge. The International Day of Yoga Challenge will occur on June 21. The next Activity Challenge for Apple Watch is set to kick off on June 21. As reported by 9to5Mac, Apple's next Activity Challenge for Apple Watch, called the International Day of Yoga Challenge, will occur on June 21, 2021. Users who want to complete the challenge will need to do at least a twenty-minute yoga workout. You can complete the workout using either the Workout app on Apple Watch, Apple Fitness+, or a yoga app that syncs with the Health app on iPhone.