What are the best times or times to aim for when it comes to sleeping good?
time of day has nothing to do with when you should sleep really. the brighter the light, the more your body wants to stay awake...hence why most people sleep at night.
beyond that its more about consistency, so you create a wake/sleep cycle that your body easily follows, and getting enough sleep in one session. without long bouts of deep sleep, you won't get enough REM state and deep sleep levels, which will affect your mind and body negatively.
But ain't there a time period where your body gets its best sleep ?