If you want to display the future date but publish them now, I’d put the future date at the top of the post, inside the post, in bold. Then people will be able to see what the date that relates to it is.
thanks for suggestions, anyway what I really need is to make appear today a post with a future date on the public blog.
sulz: i believe, that is for writing today a post that will be automatically published on a certain date.
raincoster: a date on the post body could solve some situation, but I need the correct date to be in it’s right place to have meaningful event dates on the RSS feed, as I convert it to a JSON data structure that is shown with a Simile Timeline component on this static page.