Open Event CMS is an open source content management system (CMS) built on Drupal that directly represents an Event Open Data Model. It allows cultural organizations to manage and publish their event information online. The CMS publishes event data through an API in JSON format using Schema.org standards, making the data openly available. This allows other applications and websites to integrate the event data. The CMS is customizable, with options to add features like search, caching, and ecommerce. It aims to help organizations extend the reach of their content and become part of an open data community.