Wisely said, Night portrays an interphase between two days, our body systems refuels and gets fully charged for the next day when we have a good night rest.
The sky is obviously more beautiful when observed at night because the absence of sunlight which would have interfered with the brightness of the stars during the day, making the night view romantic and magical.
I must say you took nice shots.
:) thank you for your kind words!
In nature, everything is arranged wisely. We divide the day and night, the month into days, the year into months ... it's more convenient for us to count. And nature is timeless, it just has movement and rhythms :)