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

(261) It is out of His Mercy that He has made for you Night and day,- that ye may rest therein, and that ye may seek of his Grace;- and in order that ye may be grateful.

(262) The day that He will call on them, He will say: "Where are my 'partners'? whom ye imagined (to be such)?"

(263) And those who had envied his position the day before began to say on the morrow: "Ah! it is indeed Allah Who enlarges the provision or restricts it, to any of His servants He pleases! had it not been that Allah was gracious to us, He could have caused the earth to swallow us up! Ah! those who reject Allah will assuredly never prosper."

(264) They will bear their own burdens, and (other) burdens along with their own, and on the day of Judgments they will be called to account for their falsehoods.

(265) And he said: "For you, ye have taken (for worship) idols besides Allah, out of mutual love and regard between yourselves in this life; but on the day of Judgment ye shall disown each other and curse each other: and your abode will be the Fire, and ye shall have none to help."

(266) To the Madyan (people) (We sent) their brother Shu'aib. Then he said: "O my people! serve Allah, and fear the Last day: nor commit evil on the earth, with intent to do mischief."

(267) On the day that the Punishment shall cover them from above them and from below them, and (a Voice) shall say: "Taste ye (the fruits) of your deeds!"

(268) Within a few years. With Allah is the Decision, in the past and in the Future: on that day shall the Believers rejoice-

(269) On the day that the Hour will be established, the guilty will be struck dumb with despair.

(270) On the day that the Hour will be established,- that day shall (all men) be sorted out.