The Collaborative International Dictionary
Nightless
Nightless \Night"less\, a. Having no night.
Wiktionary
nightless
a. Without night.
Usage examples of "nightless".
The Yoshiwara District, the famous Nightless City of geishas and rakes, was one of them.
Now that the polar regions had been opened up, a considerable fraction of the human race oscillated from Arctic to Antarctic at six monthly intervals, seeking the long, nightless polar summer.