Add Navigating by date (and tabs)

Navigating-by-date-%28and-tabs%29.md

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+## Navigating by date
+
+### Using the Calendar widget
+
+You can select any date in the calendar and it will jump to that date. 
+
+The act of jumping to a new date automatically saves whatever current date you were on, so there is no need to save first.
+
+### Tabs
+
+You can also right-click on a date in the calendar and open it in a new tab. If that date is already open in a tab, it will jump to that tab instead.
+
+
+### Jumping to today's date
+
+Use Ctrl+Shift+T to jump back to today.