Add time to a date field any time a certain field is updated

I am trying to figure out how to add a certain about of time to a date/time field any time a certain field is updated in the same type but here is the catch I want to do this only if the date/time is 24 hours or less from pasting the date/time set.

Here is an example a type entry has a date/time of expiration of 04/15/2019 20:00:00 and someone updates a comment field within 24 hours of the date mentioned above (say 04/15/2019 15:00:00) I want that expiration date/time to add 24 hours to the expiration date so the new expiration date would be 04/16/2019 15:00:00 and I want this cycle to continue until no one adds a comment in the last 24 hours.


To add 24 hours to a date:

some_date +(hours): 24

Like this:

Now you can do that in a workflow, right?

I will give it a try, I think I was way over thinking it… Long term this will be a dynamic value that a user can set but testing it this way will work perfect