(Obviously once you have a cut off time, if you go low, you will Need to treat it - record that low, but still use the cut off time and the
4 hours later mark) Then test your BG (
4 hours after last meal or snack) at midnight, 2am, 4am, 6am. Or you could do so every 3 hours 12am, 3am, 6am.
I am not telling you that YOU should do this, but I have been told to do so with my son from time to time.