Apple's 2017 Earth Day Challenge for Apple Watch awards iMessage Stickers
In recognition of today's Earth Day, Apple created an "Earth Day Challenge" to reward reaching 30 minutes of exercise on the day with a special achievement badge in the Activity app, as well as stickers for use within iMessage.
To earn the achievement, users can "run, walk, cycle, wheelchair or swim" in a workout of at least 30 minutes using Apple Watch or any third-party app that writes workout data to Health Kit.
Apple began incrementally adding the achievement challenge within the iOS Activity app to users as Earth Day approached. Twitter user Patrick in Melbourne, Australia was among the first to post an image of the Earth Day achievement (above).
Apple has previously created special achievement challenges, including last year's U.S. Thanksgiving holiday as well as a "Ring in the New Year Challenge" during the month of January.
In addition to feeling good about achievements earned in the Activity app, users also gain access to digital stickers that can be shared in iOS 10 iMessages.

To earn the achievement, users can "run, walk, cycle, wheelchair or swim" in a workout of at least 30 minutes using Apple Watch or any third-party app that writes workout data to Health Kit.
Earth Day achievement in Activity #AppleWatch #Imessage #ios10 #Clips
A post shared by AppleInsider (@appleinsider_official) on Apr 22, 2017 at 4:34pm PDT
Apple began incrementally adding the achievement challenge within the iOS Activity app to users as Earth Day approached. Twitter user Patrick in Melbourne, Australia was among the first to post an image of the Earth Day achievement (above).
Apple has previously created special achievement challenges, including last year's U.S. Thanksgiving holiday as well as a "Ring in the New Year Challenge" during the month of January.
In addition to feeling good about achievements earned in the Activity app, users also gain access to digital stickers that can be shared in iOS 10 iMessages.
Comments
Yay!
You can also verify you have the achievement in the Activity app on your iPhone under the Achievements tab, it will be at the top.
It could be that the walks were logged in as "other" workouts, which may not have qualified for the badge.
I've noticed that the Health app shows more calories burnt when using the "other" workout when compared to something like an indoor walk for the same amount of time, with the same speed/ inclination.
I went for a nice cycle ride in the morning and got my badge!
This is seems exceedingly stupid that I can exercise and not get credit for it but also not excerxise and get credit for excercise.