na-adjective
tranquil; calm; peaceful; serene
Describes a scene, atmosphere, or state of mind that is quiet, gentle, and free from disturbance. Often used for peaceful natural settings or a relaxed mood.
のどかな田園風景が広がっている。
A tranquil rural landscape stretches out.
On Sunday afternoon, I read a book in a peaceful mood.
na-adjective
mild; balmy
Specifically for weather that is pleasantly mild, calm, and gentle, often with a sense of spring-like warmth.
今日はのどかな春の一日だ。
Today is a mild spring day.