Everyone wants the calendar to send email notifications.

Great idea but how does one implement such a feature on a system that is not in running state to send out emails based on a timer ala a cron job.

One could place checks in global.php that check the current day and if there are events tomorrow then send out emails. After sending the emails than the check could be reset. I see no way to not have this check being run everytime someone loads a page on the board as global.php is always loaded. We could specify that the checks only be ran between the hours of 3am and 5 am for example (or 3pm to 5 pm) but what if no one logs onto your board in that time window? The checks would not be ran and the emails would not be sent out so the need for a system that is forced to always check the time. It is too kludgey for me so if anyone has suggestions on how to do this than shoot them out. How do we decide to send emails out regarding public events? Is everyone who has "allow forum admins send you email" going to recieve a notice about tomorrows events or do we add a check that asks them to "subscribe to calendar events" or even yet do we asked them to subscribe to individual events as they want.