To keep it brief, I was trying to set up a workflow to add 2 years to a date field automatically as an update field action (with the trigger being the date itself) and saw the option to change the date by 'Days' or 'Hours' - because of leap years triggering it to add 730 days would be inaccurate so I propose the idea of adding a 'Years' option. 

Is this something that's feasible?

Additionally, deluge is not something I understand at this time so writing a script for this is very far down my list of things to try - especially if this option is something in or will be in the pipeline.