6 verses have
day
in Edition Clear Qur'an by Talal Itani / Al-Anbiyaa (The Prophets)

21:20They praise night and day, without ever tiring.

21:33It is He who created the night and the day, and the sun and the moon; each floating in an orbit.

21:42Say, “Who guards you against the Merciful by night and by day?” But they turn away from the mention of their Lord.

21:47We will set up the scales of justice for the Day of Resurrection, so that no soul will suffer the least injustice. And even if it be the weight of a mustard-seed, We will bring it up. Sufficient are We as Reckoners.

21:103The Supreme Fear will not worry them, and the angels will receive them: “This is your Day which you were promised.”

21:104On the Day when We fold the heaven, like the folding of a book. Just as We began the first creation, We will repeat it—a promise binding on Us. We will act.