Manual updated at

Hey guys…

I know it is not recommended editing something in the ghost core.
So I am trying to put this option away.

The thing is I got this customer who wants to be able to have a field in the post saying “updated_at : date”. BUT… she doesnt want it to be the automatic one from the system, she wants to do it herself, like the one that already exists for published_at.

In terms of visualization I would be able to do something to work around it… I suggested her putting it in a different field and I would sanitize it treat it to re visualized as a date.

But beyond this, she wants to use this “manual updated_at” to order the latests posts as well…
I know it sounds silly, Ive already told her that… but they are clients you know… she pays the bill…

Is there anything that I could do? to approach it, without messing with the system core.?

thanks in advance…