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