Timing on an internal email

Hi all, I want to set up a delivery date and time for emails to be sent. (I'm using phpmailer) I'm coming up blank on how to do this. I thought that I could put a timing condition on a page that I know will be accessed daily that would look for the date then call the function that will do the mail outs on the appropriate date, but there has to be a better way. Is this something that I'll have to do outside of php? alex hogan