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

(21) When Talut set forth with the armies, he said: "Allah will test you at the stream: if any drinks of its water, He goes not with my army: Only those who taste not of it go with me: A mere sip out of the hand is excused." but they all drank of it, except a few. When they crossed the river,- He and the faithful ones with him,- they said: "This day We cannot cope with Goliath and his forces." but those who were convinced that they must meet Allah, said: "How oft, by Allah's will, Hath a small force vanquished a big one? Allah is with those who steadfastly persevere."

(22) O ye who believe! Spend out of (the bounties) We have provided for you, before the day comes when no bargaining (Will avail), nor friendship nor intercession. Those who reject Faith they are the wrong-doers.

(23) Or (take) the similitude of one who passed by a hamlet, all in ruins to its roofs. He said: "Oh! how shall Allah bring it (ever) to life, after (this) its death?" but Allah caused him to die for a hundred years, then raised him up (again). He said: "How long didst thou tarry (thus)?" He said: (Perhaps) a day or part of a day." He said: "Nay, thou hast tarried thus a hundred years; but look at thy food and thy drink; they show no signs of age; and look at thy donkey: And that We may make of thee a sign unto the people, Look further at the bones, how We bring them together and clothe them with flesh." When this was shown clearly to him, he said: "I know that Allah hath power over all things."

(24) O ye who believe! cancel not your charity by reminders of your generosity or by injury,- like those who spend their substance to be seen of men, but believe neither in Allah nor in the Last day. They are in parable like a hard, barren rock, on which is a little soil: on it falls heavy rain, which leaves it (Just) a bare stone. They will be able to do nothing with aught they have earned. And Allah guideth not those who reject faith.

(25) Those who (in charity) spend of their goods by night and by day, in secret and in public, have their reward with their Lord: on them shall be no fear, nor shall they grieve.

(26) And fear the day when ye shall be brought back to Allah. Then shall every soul be paid what it earned, and none shall be dealt with unjustly.

(27) "Our Lord! Thou art He that will gather mankind Together against a day about which there is no doubt; for Allah never fails in His promise."

(28) This because they say: "The Fire shall not touch us but for a few numbered days": For their forgeries deceive them as to their own religion.

(29) But how (will they fare) when we gather them together against a day about which there is no doubt, and each soul will be paid out just what it has earned, without (favour or) injustice?

(30) "Thou causest the night to gain on the day, and thou causest the day to gain on the night; Thou bringest the Living out of the dead, and Thou bringest the dead out of the Living; and Thou givest sustenance to whom Thou pleasest, without measure."