Looks like @Nige_S is way ahead of me. I tried to get some of the way there using KM actions, but got stuck.
I started out by setting today's date and the date 60 days ago to variables. I wasn't sure where I'd go with that, so I've disabled those actions for now.
So the first enabled action is the variable date being set. After that, I figured out how to isolate "16 March 2021" using Regex, and then split the day, month and year into variables using the Split Text plugin.
Then I tried to copy the logic from this post, which I think is meant to give you the number of days, but no luck.
Then I figured it was just a case of using that number in an if/else.
So, I don't know if I'm close or not, but hey, I tried!
If Older Than 60 Days....kmmacros (22 KB)