The calendar appears to show all recipes with a date. The date on most recipes by default is the date the recipe was created, but the tooltip indicates the date brewed.
My suggestion is to make the date a nullable item on the recipe so it's not unintentionally on the calendar, or create a separate date for the brew date that is used on the calendar and use the existing date for the creation/modification date.
My suggestion is to make the date a nullable item on the recipe so it's not unintentionally on the calendar, or create a separate date for the brew date that is used on the calendar and use the existing date for the creation/modification date.