The guest side: read, fill, receive
Your invitation โ email, chat, post โ carries one link, and it opens the registration page. The visitor sees what the session is: the title, the description, the agenda built in chapters with times and takeaways, the speaker with their name and photograph, and the start time with its zone label beside it. They are asked for two things that always appear, name and email, plus whatever custom questions you chose to add.
They tap register, and the useful part arrives by email: a confirmation with the time stated once more, an .ics file and a Google Calendar link for whoever wants the date in their calendar, and their own private access link for the day. Reminders then come to them at 24 hours, 1 hour and 15 minutes before the start, unless you, the host, switched them off.