Using a date from a custom meta field

Hi there, I don’t know if you are still maintaining this plugin.

I have a custom meta field for a departure date (departure-date) for holiday rental guests. It displays on their account page and is part of their user profile. I want to place a field on their account page which calculates a date 3 days prior to that date so that I can use it to display a section at that point in time using a dynamic visibility plugin. (it’s some info that is only relevant just before they leave).

Is this possible? And if so, how? ??