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

(181) And (remember) the day when We shall raise up from every nation a witness against them from amongst themselves. And We shall bring you (O Muhammad صلى الله عليه و سلم) as a witness against these. And We have sent down to you the Book (the Qur'an) as an exposition of everything, a guidance, a mercy, and glad tidings for those who have submitted themselves (to Allah as Muslims).

(182) And be not like her who undoes the thread which she has spun, after it has become strong, by taking your oaths as a means of deception among yourselves, lest a nation should be more numerous than another nation. Allah only tests you by this [i.e who obeys Allah and fulfils Allah's Covenant and who disobeys Allah and breaks Allah's Covenant]. And on the day of Resurrection, He will certainly make clear to you that wherein you used to differ [i.e. a believer confesses and believes in the Oneness of Allah and in the Prophethood of Prophet Muhammad صلى الله عليه و سلم which the disbeliever denies and that is their difference amongst them in the life of this world] .

(183) (Remember) the day when every person will come up pleading for himself, and every one will be paid in full for what he did (good or evil, belief or disbelief in the life of this world) and they will not be dealt with unjustly.

(184) The Sabbath was only prescribed for those who differed concerning it, and verily, your Lord will judge between them on the day of Resurrection about that wherein they used to differ.

(185) And We have appointed the night and the day as two Ayat (signs etc.). Then, We have obliterated the sign of the night (with darkness) while We have made the sign of the day illuminating, that you may seek bounty from your Lord, and that you may know the number of the years and the reckoning. And We have explained everything (in detail) with full explanation.

(186) And We have fastened every man's deeds to his neck, and on the day of Resurrection, We shall bring out for him a book which he will find wide open.

(187) (It will be said to him): "Read your book. You yourself are sufficient as a reckoner against you this day."

(188) On the day when He will call you, and you will answer (His Call) with (words of) His Praise and Obedience, and you will think that you have stayed (in this world) but a little while!

(189) And there is not a town (population) but We shall destroy it before the day of Resurrection, or punish it with a severe torment. That is written in the Book (of Our Decrees)

(190) [Iblis (Satan)] said: "See this one whom You have honoured above me, if You give me respite (keep me alive) to the day of Resurrection, I will surely seize and mislead his offspring (by sending them astray) all but a few!"