Noun
early night (plural early nights)
A night when someone goes to bed earlier than usual
I'm going to have an early night, because I have to wake up at the crack of dawn.
Antonym: late night
The sounds of early night die down. Mingled with the darkness of his kinsman Death and dripping with Stygian dew, Sleep enfolds the doomed city, pouring heavy ease from his unforgiving horn, and separates the men. Statius