The word(s) "day" appears 569 time(s) in 514 verse(s) in Quran in Abdullah Yusuf Ali translation.

(171) It is he whom Allah guides, that is on true Guidance; but he whom He leaves astray - for such wilt thou find no protector besides Him. On the day of Judgment We shall gather, them together, prone on their faces, blind, dumb, and deaf: their abode will be Hell: every time it shows abatement, We shall increase from them the fierceness of the Fire.

(172) Such (being their state), we raised them up (from sleep), that they might question each other. Said one of them, "How long have ye stayed (here)?" They said, "We have stayed (perhaps) a day, or part of a day." (At length) they (all) said, "Allah (alone) knows best how long ye have stayed here.... Now send ye then one of you with this money of yours to the town: let him find out which is the best food (to be had) and bring some to you, that (ye may) satisfy your hunger therewith: And let him behave with care and courtesy, and let him not inform any one about you.

(173) One day We shall remove the mountains, and thou wilt see the earth as a level stretch, and We shall gather them, all together, nor shall We leave out any one of them.

(174) One day He will say, "Call on those whom ye thought to be My partners," and they will call on them, but they will not listen to them; and We shall make for them a place of common perdition.

(175) On that day We shall leave them to surge like waves on one another: the trumpet will be blown, and We shall collect them all together.

(176) And We shall present Hell that day for Unbelievers to see, all spread out,-

(177) They are those who deny the Signs of their Lord and the fact of their having to meet Him (in the Hereafter): vain will be their works, nor shall We, on the day of Judgment, give them any weight.

(178) So Peace on him the day he was born, the day that he dies, and the day that he will be raised up to life (again)!

(179) "So eat and drink and cool (thine) eye. And if thou dost see any man, say, 'I have vowed a fast to (Allah) Most Gracious, and this day will I enter into not talk with any human being'"

(180) "So peace is on me the day I was born, the day that I die, and the day that I shall be raised up to life (again)"!