noun, adverb
Refers to the time of day around sunset, when it is getting dark. Can be used as a noun or adverbially.
日暮れ時に、街灯が一斉に点いた。
At twilight, the streetlights came on all at once.
日暮れ時になると、この公園は静かになる。
This park becomes quiet when dusk falls.
黄昏 is a more poetic or literary term for twilight, often with a nuance of melancholy.
Compound of 日暮れ (higure, 'sunset, nightfall') + 時 (toki, 'time'). The reading ひぐれどき is a rendaku form of とき.