Carpe noctem. Carpe is literally "pluck", as in what one does to a ripe fruit. In this case the verb is used to imply that the night is waiting to be enjoyed like a ripe fruit.
In Latin they reefer to the Night Sky as Dark Sky, In witch it is then abbreviated as ater caelum that is 'Dark Sky' but they use day as '''putesco caelum being day sky. So Dark can be put as...