Change header date format in Pages
The choices that are listed here are based on what is configured within the OS. You can change this, of course.


Go into your System Preferences under 'Language &amp; Region' and click 'Advanced…'.
Under the 'Dates' tab, you can change one of the formats (e.g., 'Medium') to just be the year and click 'OK'.

Restart Pages and you should now be able to customise based on year.




If you go to a computer that does not have this setting, it will still be the same until somebody edits the date field.