Yes! In our experience there will always be something that 'takes a higher priority' and although this call is easy to cancel or move, we would highly recommend you mark it as 'important' as this will be the start of a catalyst of change for the greater good for you, your family and team members.
If you do need to reschedule, you'll see a link in the calendar invite, depending on which calendar you use it'll either be ' propose a new time' or 'more options'.