Red Shift App API or Windows Night Shift Integration
Windows 10 now has the ability to turn off blue light on the display at a specified time or at sundown. It's called "Nightshift". This removes blue light allowing us to get sleep despite using backlit devices. The Oculus needs to include this same functionality so that we don't have to quit a couple hours before bedtime just to get quality sleep and not mess up our circadian rhythm.
The Oculus Quest has this option, no good reason for the Rift/Rift S to be missing it so long as the GPU and OS aren't doing anything to obstruct it.