expression, ichidan verb
the night deepens; the night wears on; night advances
Describes the progression of night into its later, quieter hours. Often used in literary or descriptive contexts.
See also: 夜更け
夜が更けるにつれて、街は静かになった。
As the night deepened, the town grew quiet.
夜が
Even as the night wore on, he continued working.