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

(61) Do they then seek after a judgment of (the days of) ignorance? But who, for a people whose faith is assured, can give better judgment than Allah?

(62) The Jews say: "Allah's hand is tied up." Be their hands tied up and be they accursed for the (blasphemy) they utter. Nay, both His hands are widely outstretched: He giveth and spendeth (of His bounty) as He pleaseth. But the revelation that cometh to thee from Allah increaseth in most of them their obstinate rebellion and blasphemy. Amongst them we have placed enmity and hatred till the day of Judgment. Every time they kindle the fire of war, Allah doth extinguish it; but they (ever) strive to do mischief on earth. And Allah loveth not those who do mischief.

(63) Those who believe (in the Qur'an), those who follow the Jewish (scriptures), and the Sabians and the Christians,- any who believe in Allah and the Last day, and work righteousness,- on them shall be no fear, nor shall they grieve.

(64) Allah will not call you to account for what is futile in your oaths, but He will call you to account for your deliberate oaths: for expiation, feed ten indigent persons, on a scale of the average for the food of your families; or clothe them; or give a slave his freedom. If that is beyond your means, fast for three days. That is the expiation for the oaths ye have sworn. But keep to your oaths. Thus doth Allah make clear to you His signs, that ye may be grateful.

(65) One day will Allah gather the messengers together, and ask: "What was the response ye received (from men to your teaching)?" They will say: "We have no knowledge: it is Thou Who knowest in full all that is hidden."

(66) Allah will say: "This is a day on which the truthful will profit from their truth: theirs are gardens, with rivers flowing beneath,- their eternal Home: Allah well-pleased with them, and they with Allah: That is the great salvation, (the fulfilment of all desires).

(67) Say: "To whom belongeth all that is in the heavens and on earth?" Say: "To Allah. He hath inscribed for Himself (the rule of) Mercy. That He will gather you together for the day of Judgment, there is no doubt whatever. It is they who have lost their own souls, that will not believe.

(68) To Him belongeth all that dwelleth (or lurketh) in the night and the day. For He is the one who heareth and knoweth all things."

(69) Say: "I would, if I disobeyed my Lord, indeed have fear of the penalty of a Mighty day.

(70) "On that day, if the penalty is averted from any, it is due to Allah's mercy; And that would be (Salvation), the obvious fulfilment of all desire.