Night Shift Mode, PLEASE

I'm on nightshift so my days are upside down, we need a feature that adapts to that, for instance a new day for me should start at 12p.m., and I'm completely unable to use the intermittent fasting feature because it will not let me do 7p.m. to 7 a.m.! Yet I wake up at 3p.m. and go to sleep at 10a.m.   

Please fix this