He is always working at night.

During the polar night, the sun does not rise even once.

I made new friends in the Seiya chat room.

I heard that she works in the nightlife industry.

The sound of the night rain is hitting the window glass.

The sound of the night rain hits the window glass.

What should I make for supper tonight?

He has gotten used to living in a foreign country.

He couldn't say anything about issues outside of his field of expertise.

He is acting like a lunatic.