How do I move between months?

The ← and → buttons either side of the month name. If you use voice, "next month", "previous month", "today" and "yesterday" all work.

The arrows step one month at a time and the month name between them says where you are.

The Calendar also takes voice commands, which is faster than clicking when you know the day you want:

• "today", "yesterday" — jump to that day and open it.
• "last Tuesday", "this Friday" — the most recent occurrence of that weekday. Last skips today if today happens to be that weekday; this includes it.
• "next month", "previous month" — step the grid.
• "show prep", "show report card", "show notes" — open the day straight to that tab of the debrief.

Those last three work from anywhere in the app, not just here: they navigate to the Calendar, open today, and land on the folder you named.