Raised through the Feature Request, but wanted to provide visibility here in the Community. Believe that at the app level, it would be ideal to have a Calendar app/function that would allow the user to create a calendar object within an existing board. It would act similar to User Story Map for example, except it would prompt the user to select year, and calendar type.
The benefit is that you do not need to pull from a calendar template. If the template is in Miroverse, it creates unnecessary steps as it asks you to create a completely new board and then you end up copying and pasting that template into the board you are already working in.
Seems like a simple app, but I am not a developer.