Just to clarify. This feature has not been implemented (yet?). Features that get fired by a time event, such as this one, or getting a daily email with the summary of the day's questions or receiving a reminder that your password is about to expire, etc rely on a piece of software that is called CRON (in the Linux world).
This tool, is an application that fires programs, scripts, whatever, at specified intervals. In order for a program to fired by Cron you need to configure it in such a way that Cron knows where the program is. If you are using a hosting service it is them the ones that can (sometimes for a fee) provide a user interface for you to configure it.
Then, the program itself, must be developed in such a way that allows Cron to fire it, taking the necessary security measures.
So it is clear that not many users would know how to setup this feature even if it existed. Not to mention that it will depend on Cron access and, as far as I know, no current feature depends on anything in Q2A.
I don't really know if this will be implemented (and heavily documented) in the future but I'm pretty sure it will not be present in 1.7.