The Events Calendar

The Events Calendar plugin already includes basic JSON-LD support, but the WPSSO Organization Markup and WPSSO Place / Location and Local SEO Meta complementary add-ons allow you to include much more detail about the organizer (as an actual Organization instead of a Person), select a performer for the event, along with WPSSO Core’s standard support for images, videos, etc.

The combination of WPSSO Core, along with its WPSSO JSON, WPSSO ORG, and WPSSO PLM complementary add-ons can provide extensive Schema markup about your event — see the following Schema JSON-LD markup for an example.