He was working until late at night.

He is clearly a night owl, working late into the night and sleeping late into the morning.

I heard that she works in the nightlife industry.

I made new friends in the Seiya chat room.

We made a lot of memories during these thousand nights.

Senya is my best friend.

I have been to Ningxia.

Natsumiko is my best friend.

When it becomes summertime, the days get longer.

Every year, a wonderful summer festival is held in this town.