This tour of Zoho Backstage will give you an idea of what Backstage has to offer. You can use this application to create public events online or at a venue. It can integrate with third-party applications like Eventbrite and Zoom.
This tour of Zoho Bookings will explain what it can do and how to set it up. Embed on your website or use as a standalone. Zoho Bookings can be integrated with your Zoho Calendar or Google Calendar. You can also sync it with your iCal to ensure you don't overlap personal or business appointments.