
Do you have time-sensitive content on your blog that needs to be removed or added on certain dates? You don’t need to do this manually! Just as you can automate so many other processes in WordPress, you can automate post updates too.
You need the Before and After WordPress plugin. This is a very simple solution. All you have are two main types of tags. One will show text (and other content) up until a certain date, after which it will be automatically removed from the live post. The other tag will hide text (and other content) up until a certain date, after which it will automatically be displayed on the live post.
The syntax does not appear to allow for specific times, but you can designate specific dates. For instance, if you to show a product announcement on September 15, 2012 but not before that, you would use this syntax:
<AFTER 2012-09-15>We are proud to announce the availability of Product XYZ.</AFTER>
The Before and After WordPress plugin works in both posts and pages. Get more information on the developer’s site, though it is in Dutch. The download button can be accessed on that page too (it’s the “down” arrow at the end of the post).