Why don't you just use a cron job for this?
Why to use cron if the ACPI wakeup addon has a setting for this?
Because you don't need to bother with a whole plugin just for that.
It is an addon, no plugin, just some scripts and there is a big chance that it is already installed. How else would his computer start to record scheduled events?
I misunderstood, I thought it was some plugin. Regardless though it doesn't take anything special to do what he wants. In addition to a single line cron, Udo posted what sounds like a good alternative as well. No extra scripts/packages/whatever necessary.
As far as how he manages `sleeping` and `waking` his system, there's more than one way to do that so who knows?