AH!! For some stupid reason it depends on how you get to the bluetooth setting. If I pull down from the top of my scree and then long press the bluetooth icon then I see the option to set the schedule. Originally I was in the settings, selected display and going this path you don't see the schedule option. I know the Android developers are really smart people but at times they really do something stupid. After finding the correct path I turned on the schedule and just selected sunset to sunrise.
Thanks for your help.