(やかん)

やかん
noun
nighttime, at night
1. nighttime, at night, during the night
Refers to the period of time between evening and morning when it is dark.
Driving at night is dangerous.
This road is closed at night.
I attend night school.
Working the night shift is hard on the body.
Construction takes place at night, so you can pass through during the day.

夜間(やかん) is a somewhat formal term for nighttime, used especially in compound expressions, signs, and official contexts. More formal than (よる) (everyday word for night).

COMMON COLLOCATIONS:

CONTRAST: