A desk calendar that is also a coin bank.
Designed to be magnetic to automatically align when rotated. (Optional, but there is a slot for a 4mm dia x2mm magnets
If this will be a gift to someone, then the receiver can use this as a calendar and wait for the date this can be opened.
If you opt to use for personal use, then you can set the date when you want this to be opened. eg., You want to buy a gunpla on your birthday, then set the open date on your birthday