Ariadne's Book of Dream

by Ariadne Green
If a scene in a dream takes place at night, it signifies exploring what is hidden or shadowed in the subconscious. Nighttime may reflect your unconscious concerns versus your conscious concerns.

Complete Dictionary of Dreams

by Dr. Mıchael Lennox
Nighttime is the feminine side of the day. Because there is darkness at night, any dream that takes place at night is rooted in the shadow and pertains to the hidden aspect of your nature.