Events Calendar- JCal Pro

There are many choices of Calendars for your website. You can set the user manager so events can be added on the front-end or the back-end. For example, you can give an employee privledges to add events. When the employee is logged in, they get an Add Events button. The Super Administrator then gets an email to approve the event before it gets published on the website, it's a nice checks and balances.