Crepuscular rays

[1] Crepuscular rays are noticeable when the contrast between light and dark is most obvious.

Crepuscular comes from the Latin word crepusculum, meaning "twilight".

[2] Crepuscular rays usually appear orange because the path through the atmosphere at dawn and dusk passes through up to 40 times as much air as rays from a high Sun at noon.

Loosely, the term crepuscular rays is sometimes extended to the general phenomenon of rays of sunlight that appear to converge at a point in the sky, irrespective of time of day.

[3][4] A rare related phenomenon are anticrepuscular rays which can appear at the same time (and coloration) as crepuscular rays but in the opposite direction of the setting sun (east rather than west).