I will put this on the top of the list, as this feature already exists and it would be a simple change in allowing the selection of two existing radio buttons.
•Motion Detection - Motion detection email on a user defined schedule
My use case: I want to monitor my home while the kids are at school, so that they return to safe home.
The user define schedule in my case is M-F from 9 AM to 3 PM and don't want to be flooded with motion detection e-mail alerts at other times, when we are home.