When I set up an appointment in Calendar, the future date & time I chose reflects back to the day and time I physically wrote the note. For example, today is June 20. If I go out to July 10 in Calendar, and make an appt. for 3:00PM and confirm it, that appt. date & time refers back to the time I wrote the appt. on June 20. I can open the appt. afterwards and physically change the date and time back to July 10 @ 3:00PM. But it will still never show up in Calendar under July 10. It will remain underdate & time I originally wrote up the appointment. Thank you in advance.