The Festival of Memories takes place a week after the end of an Event that included stickers.
During that time, you can get the missing stickers from the previous Event.
As part of the event:
- you get three random stickers as a gift,
- you can purchase individual stickers with rubies in the Store or purchase them in chests with three random stickers.
Even if you fail to get the stickers you want, you may at least get duplicates, which you can exchange.
Prize stickers are not part of the Festival of Memories.