Unfortunately I do not know about Joomla too much but I have a friend who is an expert and just to solve your query I took his help and I hope the below answer is what you are looking for

This project brings the well known and loved Events Calendar to Joomla. JEvents consists of a Joomfish compatible Joomla component and a number of modules and mambots.

Component
* One-off Events and complex repeating patterns of events can be created and viewed in an attractive calendar and a variety of list formats.
* Events can be categorised and calendar views can be customised to show all or some of these categories

Modules
* Mini-calendar module (events_cal) which gives a quick overview of events which can be placed on any page
* Latest events modue (events_latest) which gives a highly configurable summary of upcoming events
* Events legend (events_legend) – displayed alongside the component gives you a summary of event categories and an easy way to limit the events shown to specific categories

Mambots/Plugin
* A search mambot/plugin that enables the global Joomla search to return results from the events calendar
* Post event report feedback that allows event reports or photo gallery links to be shown in the event detail after a set date

Excellent component, just missing (for me) a module that shows connected user registrations. I did one you can use if you want (quick and dirty hack), available at :
http://eiannuccellidev.free.fr/index.php?option=com_remository&Itemid=32&func=fileinfo&id=1
References :
http://extensions.joomla.org/extensions/calendars-&-events/events-registration/989/details
http://www.electrocomputerwarehouse.com