I have a recurring calender that allows up to 24 sessions booked. I wanted to trigger a reminder when to update. Currently I can only remind me at a certain time of year, but that will be outdated and not work in 3 years time or something. So for longevity I want a trigger to check that there' only one session left on the calender. Maybe more if I identify that and then send a reminder. Even better if it can just automatically update for 24 more sessions at some time , day based on when the calender is about empty.