Literature Reference: 每听乌啼知夜分。——《相和歌辞 乌栖曲》 Whenever the crows caw, I know it's midnight. Source from 'Xianghe Geci Wuqi Qu'.
夜: The original meaning: The time from dusk till dawn, also used to depict mystery.
分:
Meaning: Nightfall signifies the depth of night, symbolizing tranquility and introspection.