If you are allowed to use CRON jobs, you can tie a script there to do what you want. If not you can create your own cron job.
If you (or your developers) know PHP check my
Automatic Greetings for user birthdays hack's code and algorithm. It will help you to understand both how to insert a thread to vb db and how to create your own cron job with a PHP script. Its algorithm can be adapted to do what you want. So yes, it's possible..