With this pluging you can add a countdown to your blog. Just specify an end-date in the settings (backend) and put one single line of php-code somewhere you want this countdown to be displayed. This plugin uses the ajax-technology for updating the countdown every second. The moment you change the specified date in the settings, the plugin recognizes this change and updates itself according to the new date.

COUNTdown

This plugin allows you to add an ajax-updated countdown to your blog.

Alex Polonski

Smart Countdown FX key features:
<ul>
<li>
years and months (along with “traditional” weeks, days, hours, minutes and seconds) can be displayed in the countdown interval.
</li>
<li>
counter digits changes are animated and site administrator can easily switch between available <a href="http://wp.smartcalc.org/category/animation-profiles/" rel="nofollow ugc">animation profiles</a>, included with the plugin or added later.
</li>
<li>
event <a href="http://wp.smartcalc.org/category/event-import-plugins/" rel="nofollow ugc">import plugins</a> support, no need to manually edit widget settings or shortcode for recurring or calendar events.
</li>
</ul>
Other features
Smart Countdown FX can show both countdown and count up counters, and it will switch to the “count up” mode automatically when the event time arrives. Event description can be configured individually for countdown and count up modes and can containt HTML markup allowed for a post.
Smart Countdown FX supports different layouts. Most popular layouts (sidebar, shortcode, shortcode compact, etc.) are included in the package and can be selected in the widget options or using a shortcode attribute. Custom layout presets can be easily created using existing ones as a starting point. You will find detailed instructions in the documentation.
RTL languages are natively supported in all counter layouts.
Smart Countdown FX widget is responsive. Open “Responsive” page on different handheld devices or just change your browser window width if you are on a desktop to see the feature in action.
More than one countdown can be displayed on the same page, each instance with its individual settings and configuration.
Events import plugins are supported.
<a href="http://wp.smartcalc.org/" rel="nofollow ugc">Project home page</a>
Coming soon
<ul>
<li>
More event import plugins for popular event management plugins and services.
</li>
<li>
More animation profiles.
</li>
</ul>

Smart Countdown FX

Smart Countdown FX displays a responsive animated countdown. Supports years and months display and recurring events

COUNTdown vs Smart Countdown FX