The word(s) "day" appears 704 time(s) in 579 verse(s) in Quran in Mohsin Khan translation.

(131) And they ask you (O Muhammad صلى الله عليه وسلم) to inform them (saying): "Is it true (i.e. the torment and the establishment of the Hour - the day of Resurrection)?" Say: "Yes! By my Lord! It is the very truth! and you cannot escape it!"

(132) And what think those who invent a lie against Allah, on the day of Resurrection? [i.e. Do they think that they will be forgiven and excused! Nay, they will have an eternal punishment in the Fire of Hell]. Truly, Allah is full of Bounty to mankind, but most of them are ungrateful.

(133) He it is Who has appointed for you the night that you may rest therein, and the day to make things visible (to you). Verily, in this are Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) for a people who listen (i.e. those who think deeply).

(134) So this day We shall deliver your (dead) body (out from the sea) that you may be a sign to those who come after you! And verily, many among mankind are heedless of Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.).

(135) And indeed We settled the Children of Israel in an honourable dwelling place (Sham and Misr), and provided them with good things, and they differed not until the knowledge came to them. Verily, Allah will judge between them on the day of Resurrection in that in which they used to differ.

(136) Then do they wait for (anything) save for (a destruction) like that of the days of the men who passed away before them? Say: "Wait then, I am (too) with you among those who wait."

(137) And (commanding you): "Seek the forgiveness of your Lord, and turn to Him in repentance, that He may grant you good enjoyment, for a term appointed, and bestow His abounding Grace to every owner of grace (i.e. the one who helps and serves the needy and deserving, physically and with his wealth, and even with good words). But if you turn away, then I fear for you the torment of a Great day (i.e. the day of Resurrection).

(138) And He it is Who has created the heavens and the earth in six days and His Throne was on the water, that He might try you, which of you is the best in deeds. But if you were to say to them: "You shall indeed be raised up after death," those who disbelieve would be sure to say, "This is nothing but obvious magic. "

(139) And if We delay the torment for them till a determined term, they are sure to say, "What keeps it back?" Verily, on the day it reaches them, nothing will turn it away from them, and they will be surrounded by (or fall in) that at which they used to mock!

(140) "That you worship none but Allah; surely, I fear for you the torment of a painful day."