night
(noun)
at night
It often gets cold here at night.
by night
Many animals hunt by night.
in the middle of the night
I woke up in the middle of the night.
on + day of the week + night
The accident happened on Monday night.
on the night of + date
Where were you on the night of May 10?
on the night of + event
Where were you on the night of the fire?