Hi @Inks. There is no option to set it so that a certain Contact Sensor is unarmed at a specific time. You can control which sensors are monitored in Home and Away Mode using the Modes feature. We also have the Modes Scheduling feature you can use alongside adjusting which sensors are monitored in which Mode.
You can also add your suggestion to our Feature Request board. This will help us to organize and share your requests with our teams here, as well as allow other neighbors to comment and add interest, all in one place. Feel free to link that post you make in the Feature Request board here so other neighbors that come to this thread can easily find your feature!