The party has been postponed to the afterwards day, nevertheless the date just isn't known yet. Keep the initial day in the startDate of your party till you recognize when the party will take place. The moment you realize the new day details, change the eventStatus to EventRescheduled and update https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html