When a ticket buyer has purchased a ticket from you, you can choose to include an ‘Add to calendar’ link in their event confirmation email. They'll then be able to add your event to their Google, Apple, Office, Outlook and Yahoo calendars.
💡 Check out this help article about how to edit an order confirmation if you need a reminder on how to do that.
All you need to do is use the ‘Add to calendar link' placeholder when setting up your event confirmation.