I see others have requested this several times. Support says they sent it to the development team for consideration but no real reply on the status or if a consideration has even been discussed. I see you can do this via voice but not with ease for some users.
The problem is I turn on night sound and then forget that it's on for months reducing the quality of sound and my experience. It would be great if you could schedule during the week Monday through Friday at one time and on the weekends for family movie time at a different time. Simple feature like this would not only improve the entire family's experience but also improve quality of sleep for some.
Cheers!