I'm working on a date range field. The date field only provides you the ability to input a date. I'd like to construct a field that displays the length of time from the date start field and the date end field.
My Use case: The content type is a job. E.g. I worked at that job from january 1, 2001-January 23rd, 2002.
Desired output: e.g. (11 months) or (3 years 2 months)
How do you create a field that calculates the length of duration? Is there a module that currently exists? or would a formatter be needed?