three-dog night

bank night

An event where patrons are enticed to buy entry tickets into some venue, for example a movie theater, with the anticipation that they will be entered into a drawing to win an amount of money if their ticket is drawn and they are on-site at the time of the winning.

call it a night

To go to bed to sleep.

call it an early night

To go to bed or cease one's activities earlier in the evening than usual.

creature of the night

A prostitute.

day or night

At any time; 24/7

dead of night

Middle of the night.

make a night of it

To continue a pleasurable social activity for the whole evening or night.

night in, night out

During every night; continuously.