To turn off the night function on your device, you need to access the settings of your device's display. The location of the display settings varies depending on the device you are using. Once you've located the display settings, look for the option to turn off the night function or blue light filter. If you are having trouble finding the option, try searching for it in the settings search bar. Once you've found the option, toggle it off to disable the night function on your device. Turning off the night function can help reduce eye strain and may improve sleep quality by reducing exposure to blue light in the evening.