We’ve improved the Schema.org markup functionality in the Event Calendar to help search engines better understand your events and display more accurate event information 
Here’s what’s new:
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We’ve enhanced structured data accuracy with support for the correct date format for all-day events, multiple Venues and Hosts,
eventStatus, andorganizerfields — helping search engines get a more complete picture of your events. -
You can now enable or disable Schema.org markup directly from the settings. Previously, it was always enabled by default.
These improvements make your event data more reliable and give search engines the information they need to better interpret and showcase your events.