Once installed, it will be possible create a event in a section called “Agenda”. You will see a page like your seeing any post. But with this plugin, you will save information about start date, end date and about hours that start and ends. I hope I can make a integration with facebook later!
Thanks for <a href="http://arshaw.com/fullcalendar/" title="wp-agenda tutorial at my blog" rel="nofollow ugc">Full Calendar</a> for the great plugin!
You can check a full tutorial in the post http://blog.alexandremagno.net/en/2012/06/making-wordpress-events-with-wp-agenda/
Well, you can have a fully customizable template just adding a agenda.php file in the main template, and then just insert this markup to make it works:
Now you can access the calendar at http://yourwordpresspage/?agenda
You can create a menu widget with the above link to calendar, but you can use as you prefer.
This is the plugin features and that makes different of other ones around:
<ul>
<li>Making a event manager of a wordpress way, the right way, using post-type to have fully customization.</li>
<li>A rich UI for the calendar</li>
<li>Easy event manager, with all the post features, as featured image</li>
</ul>

WP Agenda

A complete events manager for wordpress using the post type api, completely flexible with rich UI. Checkout a great tutorial about the plugin instruc …

DanCoulter

This plugin is geared toward bands and musicians to manage and display a 
calendar of their gigs within WordPress. It’s meant to be as easy as possible 
for both the musician and the fan. It even manages venue data complete 
with mapping and ticket links.
<h3>Compatibility notes</h3>
= Browser = 
This plugin’s administration pages are currently only supported fully by the 
Firefox and Safari browsers. When I am approaching version 1.0, I plan to 
develop full support for IE7 and Opera. If you would like to know more about 
my decision to focus on Firefox and Safari, feel free to get in touch with me.
<h4>WordPress</h4>
If you are using a WordPress version less than 2.3, you may need to create the 
database tables manually. You can find the SQL in tables.sql. Get in touch with 
me if you need help doing that. You might also want to consider updating to the 
most recent version of WordPress.
<h4>MySQL</h4>
If you are using a MySQL version less than 4.1, filtering the gig posts from 
your normal blog entries will be disabled. You will need to filter those based 
on the category you select in the settings page using another plugin. I suggest 
the Advanced Category Excluder (https://wordpress.org/extend/plugins/advanced-category-excluder/) plugin.

Gigs Calendar

Manage and display a calendar of your gigs/shows/performances.

WP Agenda vs Gigs Calendar