A while back I starting using the Future Post plugin (that I wrote), and it seems to be working fine. Any future scheduled posts appear on the sidebar widget, up to the count I’ve specified. It also shows the ‘heads up’ number of days or hours until publication. It does NOT show the exact time of publication.
That’s why I created the admin dashboard widget that shows a list of future posts, with links to edit, and the exact scheduled publication date.
It also shows the ‘heads up’ countdown, but it’s convenient as an administrator to know exactly when the post will publish.
