This article shows you how you can change the time or day an appointment is booked in your calendar.
To move an appointment in your calendar, select the appointment > Click the Move/Copy Appointment button in the right toolbar (see clipboard icon) > Go to the desired day and select a timeslot.
Click Move or Copy in the pop-up window that appears.
If you click Copy, the appointment remains in the original timeslot and it's also copied to the new timeslot.
If you click Move, the appointment is moved from its original timeslot to the new one.