User blog comment:Akrie/September 16th Events & Updates~!/@comment-107.15.251.124-20150918042640/@comment-26044650-20150918043536

There are no deadlines for the one time only packages but if the packages in Kakao are any indication, they are there to stay as they have not left Kakao yet.

So it looks as though only the Cookie Packages will be changing to feature that month's Cookie monthly. So in October, Peppermint Candy Cookie will likely be that month's Cookie Package.