This plugin can display multiple private (and public) Google calendars with a shortcode, Gutenberg block or as a widget. See the webpage for more information. Features Access to private (and public) calendars by using OAuth2 or an API key. Adjustable caching – this can greatly improve the performance. It uses the FullCalendar library to show the calendar and can be fully customized within the Gutenberg block, shorcode attributes and the widget settings. Calendar filtering.