noun
sky aglow with sunset; red sky at dusk
Describes the sky lit up in warm colors by the setting sun; a poetic or descriptive noun.
窓の外に広がる夕焼け空がとてもきれいだった。
The sunset sky spreading outside the window was very beautiful.
子どもたちは夕焼け空の下で遊んでいた。
The children were playing under the red evening sky.