A Night or A Sunday Morning??

Hi hi... Its so late and i am still awake... thats me.... Sigh... Though i know that staying up late is realli bad for health, i just cant kick the habit... I always enjoy doing stuff at night since i can concentrate better. However, the next day, i will have to try hard to keep awake during lecture and tutorials.
 
The night is always so peaceful and quiet (except for the bubbling sound coming from my water pump... =p) With a table lamp as the only source of light (plus a bit of moon light =p), there is always this sense of tranquility... Somehow, I tend to be more emotional at this period of time. More emotional means less practical, i guess. It wont be appropriate for me to make any serious decision at this point of time... From my past experience, i always regretted on decision made when the sky is dark... well well... Guess i have a bit of split personality... =p...
 
Think i am surrounded by nocturnal friends. One particular fren is our dear Bernadette... haha... She kept mumbling that staying up late is unhealthy and bad for complexion and she is also the one waiting for the sun to rise be4 she sleep... =p (Maybe i have exaggerated... Sorry my fren...)
 
What is exactly the night? Anytime when the sky is dark? Or the night ends be4 12 midnight? So why do we still say "good night" when its already the day, i mean when the watch is stated xxx a.m (Past midnight)... Should we say good morning instead? Or shd we say "its veri late at night" or "its veri early in the morning"? Hmmm.... haha... I am thinking about useless stuff again... =p
 
Enough of crap... Wish everyone a good night/good morning... whatever...