日夜

In a sentence

• 日夜努力を続けています。

  I continue to make efforts day and night.

  Here, '日夜' is used to mean 'day and night,' indicating continuous exertion.

• 彼は日夜新しい技術の研究をしています。

  He researches new technologies day and night.

  Here, '日夜' is employed to highlight the constant activity of research throughout the day and night.

• 日夜を問わず救援活動を行っています。

  Rescue activities are conducted regardless of day or night.

  Here, '日夜' emphasizes that the activities are performed independent of day or night time.