In Drupal 7, I can show the creation date for the single nodes, in their pages. The creation date isn't shown in admin/content, though.
Is there a way to add a creation date column to the node list on admin/content?
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I believe the purpose of this module Administration Views is exactly what you are asking for.
Once you install it, it will allow you to override your "content" page.
This way you can add extra columns, sorting and filters to that page, using the Views UI.
The View you are looking for is called Administration: Nodes (at least in D7) and if you edit that and add fields, they will show up on the content overview page. (comment by @Neograph734)
Hope this helps!
If for some reason you don't want to use the Administration Views module as suggested previously, you can create a View of your content with the field you want. If you use the Views Bulk Operations module, you can also add operations that include the actions you can do on on admin page.