Puesta del sol vs. ocaso vs. atardecer

'Puesta del sol', 'ocaso' and 'atardecer' are three Spanish words commonly used to describe a sunset. Although they are often used interchangeably, each word has its own nuances and contexts in which it is typically used. Understanding the difference can enrich your appreciation of the Spanish language and its expressions related to the end of the day.

Puesta del sol

'Puesta del sol' refers directly to the moment when the sun disappears below the horizon at the end of the day. It emphasizes the physical motion of the setting sun.
La puesta del sol en la playa fue espectacular ayer.
(The sunset on the beach was spectacular yesterday.)
Vamos a cenar al aire libre para ver la puesta del sol.
(Let's have dinner outside to watch the sunset.)

Ocaso

'Ocaso' is a more literary or poetic term for sunset, often used to evoke a particular mood or atmosphere, and can also imply decline or the end of a period or era in a metaphorical sense.
El ocaso tiñó el cielo de tonos rojizos y morados.
(The sunset dyed the sky with reddish and purple hues.)
En el ocaso de su carrera, el atleta aún logró ganar una última medalla.
(In the twilight of his career, the athlete still managed to win one last medal.)

Atardecer

'Atardecer' refers to the period of time in the evening before night falls, which includes but is not limited to, sunset. It can denote both the process of getting dark and the time frame itself, often being synonymous with 'evening'.
El atardecer es mi momento favorito para caminar por el parque.
(Sunset is my favourite time to walk in the park.)
Nos quedamos conversando hasta que pasó el atardecer y las primeras estrellas aparecieron.
(We stayed talking until dusk passed and the first stars appeared.)

Summary

While 'puesta del sol', 'ocaso' and 'atardecer' all refer to evening and sunset, they each have unique connotations: 'puesta del sol' is more focused on the actual sunset; 'ocaso' has poetic or metaphorical implications beyond the sunset; and 'atardecer' captures the broader experience of the evening as daylight fades into night.