Timed Ring Modes

Can you please add the feature of timing a Ring Mode. Like "I want to activate Home Mode for X hours". For example.. I put the system in Home Mode when the kids play in the back yard. But then in the evening when they are back in the house, I forget to put the system back in Away mode... so the back garden is unproctected all night... So timing like the Snooze on Modes would be so cool and can't be hard to implement, right ? What keeps you from doing this, Ring ???