Steps:

1. Go to Content/Content structure.
2. Create new content item e.g. Folder.
3. Click on Hide button.
4. Select Hide later and set date time.
5. Click on Cancel button.

Result: Content item 'Folder' hidden. message appears. See, please:  http://g.recordit.co/KAUpkvE946.gif 

Remark: The same message appears when setting Hide later which is confusing because the content is not hidden yet.