You can use this on December 1st - 24th. Click on create new calendar to... create a new calendar. Who would of guessed. Click on the boxes to get a present- a ornament. Click on the tree to place it- click on the folder icon to store it. Click on the folder icon without a ornament to see storage. Click on get seed to get a seed- this can be entered if you restart the project and click create from a seed.
More updates will be added in the future! Folder icon inspired by Windows folder icon. Griffpatch for the code for the numbers on the boxes and seed. Please give feedback!