We will need a bit more information than that to help solve your problem :-).
Did you choose the “Last modified” (under “Custom”) or the “Date” (under “Default”) column type? For what post type did you add the column? Does the column itself show in the posts overview?
I choose “last modified under “Custom”.
Column appear in the posts overview,but it’s empty.
I check another options,like words number and that work just fine.
The “Last modified” option don’t..
For what post type did you add the column? Was it a custom post type, or “Post” or “Page” for example?
It doesn’t work for “post” or “pages”.I try both.
Just found the cause..
Actually i choose for my posts do not show the publishing data..
I simply choose to show in d.m.y and issue solved..