Adam Erstelle

This plugin allows a wordpress administrator to schedule an additional css file to display on the website for holidays or special events for all visitors.
The css file will be added to the live site. Great for setting a Christmas theme!
If you just want to have a theme loaded instead of just a css file, check out the wp-scheduled-themes plugin.

WP Scheduled Styles

Schedule a css file to display on the live site for holidays or special events. (Available from Appearance - Scheduled Styles)

WolfieZero

Ever wanted to show a particular section of cotent on a certain date but don’t want to do it to the whole post or page? “Display This When…” will allow you to block of a section of your content to only show on a set date.
Say if you want enter in an April Fools Day joke into your post, all you need do is this:
[displaythis when=”01-04″ format=”d-m”]Chinchillas know how to use dynamite![/displaythis]
And thus chinchillas will use dynamite on the 1st of April.
Default format type is “d-m-Y” (01-01-2011)

Display This When…

Display certain parts of content at a certain time

WP Scheduled Styles vs Display This When…