Need to send an update to all of your event's guests? Go to your Manage Events page, open the Select an Option dropdown menu for your event, and select Email Attendees from the options. This will take you to a form to enter an email title and compose the email. You can send the email to all upcoming event times, or select specific event times to notify (i.e. an update specific to just one date).

If you need to send emails for a past event time, you will need to update its end time so that it is in the future.