Reminders Manager

Reminders make it easy to alert users when an appointment in the Calendar is approaching or is past due. You can customize how much in advanced or how long after the appointment's due time to alert the user. Alerting users about an appointment is a great way to keep the user informed. All you need to do is specify how far in advance or how long after an appointment the reminder should occur and the calendar will notify you.

A Notification is Sent When an Appointment is Past Due or Upcoming