modify date token in View to extract only year?
Steps to get the just the year for Delivery Date field


Navigate to /admin/config/regional/date-time/formats page.
Click on Add Format button (/admin/config/regional/date-time/formats/add)
In the Format string text field add Y and save it.
Now add a date type by navigating to /admin/config/regional/date-time page. 
Add a new date type and use the the format that we have added in the previous steps.
In the view select the type you want the date to be rendered.




So instead of Rewriting the output, you would directly get the year.

Hope that this will help you.