Currently, an event has a reminder option, which sends the user who RSVP’d a message on the community. This does not send an email to the user.
As it is easy to forget about an event outside your work if you don’t add it to your calendar (or even if you do), I would like the ability to change the reminder to an email and customize the text and timing of the reminder. The reminders should go out to anyone who RSVP’d or marked Interested.