Calendarize it! was originally created without support for Visual Composer. Please notice that you do not need Visual Composer to use the plugin, but if you have Visual Composer you can take advantage of the built-in compatibility with this plugin and build your own templates using the popular drag and drop page builder in Visual Composer.
Compatibility Fix: CSS issue with WordPress TwentySixteen theme
Update: Added a filter for default value for automatic content in Options
Bug Fixed: WPML compatibility fix XML parsing error
New Feature: Allow showing other events (Reference Events) in the wp-admin Add New Event interface (Options > General Settings)
New Feature: Show both Start Time and End Time when using the Reference Events feature