Since i spent more time looking for the calendar icon than I like to admit. You have to install a community plugin called ‘Calendar’ and then it will pop up on the top right. Using the calendar works like a charm.
I’d like to chime in to request a low-friction way to start tomorrow’s daily note.
I suggest a modifier key to the “Open today’s daily note” button. For example, holding shift would change it to “Open tomorrow’s daily note”.
I know this feels pretty special-case, but I think planning for tomorrow at the end of the day is a pretty common workflow.