Hey!
Thanks for reaching out to us!
Past events remain visible and indexed on your site after the event has passed. They aren’t deleted after a period of time. If you’re using the PRO version of the plugin, you can set a clearout time for Recurring Events where recurring events over a certain age will be automatically be deleted.
Let me know if this helps. If you have any further questions when considering our plugins, please don’t hesitate to ask.
Thanks!