Zodiacal Light: Or what is known as False Dawn. Faint light from the Sun reflected from outer-space dust. Falsely presumed by many to be sunset terrestrial creation.
Observation can be done by:
...the ecliptic, the line in the sky where the sun, moon, and planets move, be at a high angle to the horizon. This happens in February and March in the western sky after dusk, and in September and October in the eastern sky before dawn.