Every two weeks we have a new Special Mission available for a limited time. Alongside this Special Mission there is always a Collection Mission.
In a Collection Mission you are required to collect items themed after the Special Mission. These items can be found when harvesting specific crops, gathering fruit from specific trees and collecting products from specific machines or animals. Tap the Collection Mission icon on the right side on the screen (just above the Gift Box icon) to open the Collection Mission panel. The required items are listed in the bottom, and you can tap each of them to see the detailed explanation of how to find them. Finish all 4 Collection Mission tasks to get a special reward!