Calendar Website based on Joomla CMS

Website will be based on a Joomla CMS (content management system) with a 'Vortex" rocket theme template. Description: The main theme of the website is a community calendar. Website will incorporate a calendar that will list events for a specific city or group that anyone can view. New Calendars can only be added by webmaster. Events can be added to a specific Calendar by people that have the proper log-in permissions. Must be easy to add events. These events will be added by people without programming experience Events will have capability of listing description, the start and stop time of the event. Location of event and who is holding the event. The user will be able to email and print copy of the calendar for the event. There is the possibility that there could be 1,000s of groups. The front page will have a button labeled Calendars that will have a drop down list to enable them to pick the state. That will take them to another page that will have the capability of displaying information about the state. On the "state" page there will be links to all the calendars for that state. Each of these links will point to a page that has the calendar and the capability of displaying additional information. The project should include the registration module where users are authorized to add events to the calendar. Web master will have the previllage to add a calendar. Please clarify this is the same calendar as that of our day calendar that we are using or anything different. If same how the webmaster will add the calendar. Already there should be list of month calendar that the webmaster can issue. Adding of event by the registered users with description is stored to the calendar when public users visit the calendar there will be many number of events for a particular time entered by different registered users(could be 1000's of groups) how this should be handled. Regards to all, Richard