If you want to refer to a certain date in your story you can define this date as a reference date. Therewith you have the possibility, to sort the storys a RSS Feed or a newsflash independently from the start date of the publication of the story.
Fair A is on October 30, 2008. I write a preview in August 1, 2008.
Training B is on July 12, 2008. I refr to it on June 30, 2008.
The moment of story publication is the start date, the date of the event is the reference date.