Capabilities/mod/forum:viewhiddentimedposts
From MoodleDocs
Template:Moodle 1.8*This allows a user to create timed posts i.e. set a display start and end date for a new discussion. It also allows a user to view timed posts whilst they are hidden.
- This capability is allowed for default admin, teacher and non-editing teacher roles and is not set for the default student role.
Note: The timed posts feature is disabled by default. It may be enabled in the Forum settings via Administration > Modules > Activities.