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...
In the camera settings, under Event -> Arming Schedule: set the times you want it to be on. I have mine set at 00:00-06:00 and 17:30-24:00 which works for my area, though as daylight savings kicks in later in the year it will likely need adjustment. I don't use the HikVision NVR though so not...