The Events Calendar

The Events Calendar plugin already includes basic JSON-LD support, but the WPSSO Organization Markup and WPSSO Place / Location and Local Business Meta 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, WPSSO JSON, WPSSO ORG, and WPSSO PLM add-ons can provide extensive Schema markup about your event — see the following Schema JSON-LD markup for an example.