Is there a calendar?

Yes. The Calendar tab shows a month at a time, with a ring around any day that has something on it. Tap a day to see it.

What appears there is decided per list, when you make it:

• On due date — checklist items show on the day they are due.
• On date created — entries show on the day you wrote them, which is what turns a notes list into a journal.
• Never — the list stays off the calendar entirely. A grocery list has no business there.

You can also capture straight onto a day from the calendar, and what you write is dated to that day rather than today.