I record and receive event notifications 24/7 irrespective of the camera arming schedule, but that is because I have configured it to do so on my
BlueIris server which has settings independent of the camera.
I don't use a HikVision NVR so perhaps someone else could chime in to verify, but as I understand it the arming schedule
on the camera applies only to the camera settings such as the LED illumination.
Recording and event schedule are configured on your NVR.
I dont use Smart Events such as Intrusion Detection simply because I dont use HikVision NVR so am unable to comment, though my assumption is the same principle of the arming schedule applies. I'd recommend configuring one camera with the arming schedule to see it still sends events while not triggering the LED? Then when it gets dark head back outside and see if it also triggers the LED + notifications.