Just Before Nightfall is a term used to describe the time of day right before the sun sets. It is also known as SUNSET or Atdusk, which are both 6 letter words. SUNSET is the time of day when the sun is just below the horizon and the sky is usually orange or red. Atdusk is the time of day when the sky is darkening and the stars are beginning to appear. Both terms refer to the same time of day, just before nightfall.