Jason Hendriks

Calculates dates and relative dates dynamically in your posts and pages. For example:
<blockquote>
Our church’s next service is on Mar 21/15
<code>[date format="M d/Y" time="this Sunday"]</code>
</blockquote>
Add an always up-to-date copyright notice, or the date of your next monthly poker game.
See <a href="http://programmer.jasonhendriks.com/dynamic-dates/dynamic-dates-examples/" rel="nofollow ugc">examples on my website</a>. See the FAQ for instructions on use.
<h3>* What’s New for v2 *</h3>
<ul>
<li>Now supporting the local WordPress timezone, user-specified timezones, and user-specified languages!</li>
</ul>
<h4>Requirements</h4>
<ul>
<li>PHP 5.2 for user-specified timezones or PHP 5.3 with the International extension for user-specified languages.</li>
</ul>

Dynamic Dates

Calculate dates ('next Sunday') and relative dates ('December 25th two years from now') in your posts and pages.

Meini

Creates digital real time world clocks on your posts or pages using simple shortcode. The customizable clocks show the name and current time of the location of your choice.
<ul>
<li>The clocks display the current time, even if the user’s computer clock is wrong.</li>
<li>Automatic adjustment for Daylight Saving Time</li>
<li>All major time zones supported</li>
<li>Customizable and easy to use with shortcode</li>
</ul>
Quick Start
<ul>
<li>
Put the following shortcode anywhere on your post or page to create a GMT/UTC clock:
<pre><code>[worldtime] 
</code></pre>
</li>
<li>
Use the ‘places’ parameter to specify the clock’s time zone:
<pre><code>[worldtime places="Paris"] 
</code></pre>
</li>
<li>
List several places separated by a comma. This will create multiple world clocks in a stack (currently maximum 6)
<pre><code>[worldtime places="Rome, New York"] 
</code></pre>
</li>
</ul>
The name of the location has to match exactly with a name in the list of the locations. For a complete list of all locations visit 
http://www.utechworld.com/locations/
Please note currently there are only up to 6 clocks supported in a stack. Also please limit the total number of clocks per page to 6, see below for further details.
Complete list of parameters of this version
<pre><code>places
</code></pre>
takes a list of comma separated towns
<pre><code>base_color
</code></pre>
background color e.g. base_color=fff 
for white
<pre><code>base_font_color
</code></pre>
location font color e.g. base_color=000 
for black
<pre><code>base_font_size
</code></pre>
location font size
<pre><code>clock_color
</code></pre>
time background color
<pre><code>clock_font_color
</code></pre>
clock font color
<pre><code>clock_font_size
</code></pre>
clock font size
<pre><code>gap
</code></pre>
space (in pixels) between individual clocks in a stack
<pre><code>width
</code></pre>
overrides width in pixels
<pre><code>sec
</code></pre>
will hide seconds if set to 0, e.g. sec=0
<h3>What else you need to know</h3>
This plugin utilizes services provided by <a href="http://timeanddate.com" rel="nofollow ugc">TimeAndDate.com</a> and is brought to you with their friendly permission.
TimeAndDate’s condition of use stipulates a maximum of 6 clocks per page. In future this limit will be removed however for now it is important to stick to it as each clock creates a connection to their server (and ours). TimeAndDate also requires a separate link to their site if more than two clocks are used.

Utech World Time

Creates real time customizable digital world clocks of any location of your choice on your posts or pages using simple shortcode.

Dynamic Dates vs Utech World Time