Here is how to delete a Reminder from the Event Planner Calendar:

  1. Launch the Event Planner.
  2. Click on the day in the Calendar that has the Reminder being removed.
  3. Click on the Reminder on the list that appears to the left of the Calendar.
  4. Click on the details to the Reminder that appears below it.
  5. Click the Delete Note button.
  6. Click Yes to confirm the deletion.

Note: This will only delete manually entered Note Reminders. To remove Birthday or Anniversary Reminders, you need to modify the person's entry in the Address Book to remove the Reminder.