Diary Calendar

The Diary Calendar is the reworked version of the Diary, released in the Feast in the Yakgwa Village update. In the Diary Calendar, you can complete a daily mission for a daily reward and decorate your Calendar with stickers.

Missions
The Diary Calendar missions are very short and simple: it can be running in Trophy Race once and check the result, running in the Breakout Mode (Either the Main Episode or the Special Episode), running in Guild Runs once (Friendly matches included), reaching 3 stars in a Main Story chapter (If you don't have all the chapters 100% complete), or reaching a Rank in a Cookie Trial (Can be both normal and hard mode, and only if the Trial's possible to reach the Rank with your Cookie & Pet level). You can refresh a mission for other ones. Completing a mission will update the Diary Calendar's current day with the Combi you used to complete the mission. The Diary Calendar keeps track of the number of missions you've completed.

Rewards
There are 2 types of rewards: the Daily Stamp Rewards and Weekly Stamp Rewards. Daily Stamp Rewards are available every day, and will refresh after getting 5 Stamp Rewards. The Weekly Stamp Rewards are available every week, and will refresh after 3 Weekly Stamp Rewards. The Daily Stamp Rewards rewards can be 100,  50,000 or 70,000,  1 or 2, or  ???. The Weekly Stamp Rewards can be either 500 or  300. You can see how many stamp sheets you've completed by the number in the top-right corner.

Calendar Designs
Since the Curse of the Sacred Forest update, you can customize the Diary Calendar design for different ones. the Calendar designs are usually only available in Events. Currently, only month specific Calendar designs are available.

Stickers
Since the Curse of the Sacred Forest update, you can place stickers in the Diary Calendar to customize it. There are 2 types of Stickers: Individual Stickers, which can be always used regardless of the month, and Calendar Sticker Packs, which can be only used in one month. Individual Stickers available are the Breakout Rank Stickers, which can be gotten depending on your Main Breakout Episode Rank, and Rating Trophy Stickers, which can be gotten from the end of season Champions League Rating. Calendar Sticker Packs can be gotten from Events as a free reward. Calendar Sticker Packs contain a minimum of 3 stickers, 2 of them being Cookie heads.