How to perform views date calculations using global math? Is it possible to calculate date in Views like to calculate two cell using global math for this case?

Example:


Nick's birth of date was 20/10/2005
Only 20 years old can join the club
So before 31/10/2025 Nick cannot join the club, 
its mean Nick needs to wait for 10 years 10 days (date 31/10/2025) to join the club.


Can anyone assist me to solve this?
You can try Views PHP which allows you to add a php code field to a View. 

Otherwise, for a less "dangerous" solution, you can add a field to your content type for which you are creating the View, hide the field from the node creation form with css, hook_form_alter() or Display Suite, and create a Rule that calculates the new date when a user save new content. This field could be a Date field, or an Interval field if you want to store the interval between two dates.