Planned publishing and depublishing of nodes... use this simple module.
You can activate Scheduler in every content type
The module depends on the Simplenews module. You can plan the sending of the newsletters as you wish.
You choose the moment of publishing-depublishing, promotion to the front page- or not, granting users permissions- or not,...
This module can schedule all of that and a lot more...
After activation, look at at Workflow.