This is the definitive guide to the calendar tab. All things calendary will be hosted here and all that is here shall be calendary!
The calendar tab is a fairly simple mode. It gives you access to your entries by date and title. Click a date to see all the entries for that date listed by title/subject in the pane blow the calendar.
You can navigate on the calendar with the arrows near the top of it:
To open an entry double click on it in the list of them below the calendar. The "Add A New Entry" is a virtual entry present for all days to help you quickly open a new entry for that day. You may have as many entries as you wish for a single day, although more than about 15 has never been tested (if there's a problem it'll happen at 100).