I completely agree with your use case ! It feels to me like the simplest would be to treat the Date type as any other type, and be able to write text and add content to dates.
The topic is already being discussed here: https://community.anytype.io/t/daily-notes-journal and here: https://community.anytype.io/t/allow-the-date-type-to-have-all-the-functionalities-of-a-normal-type