The word(s) "day" appears 568 time(s) in 513 verse(s) in Quran in Muhammad Pickthal translation.

(321) Say: Lo! if I should disobey my Lord, I fear the doom of a tremendous day.

(322) Then worship what ye will beside Him. Say: The losers will be those who lose themselves and their housefolk on the day of Resurrection. Ah, that will be the manifest loss!

(323) Is he then, who will strike his face against the awful doom upon the day of Resurrection (as he who doeth right)? And it will be said unto the wrong-doers: Taste what ye used to earn.

(324) Then lo! on the day of Resurrection, before your Lord ye will dispute.

(325) And though those who do wrong possess all that is in the earth, and therewith as much again, they verily will seek to ransom themselves therewith on the day of Resurrection from the awful doom; and there will appear unto them, from their Lord, that wherewith they never reckoned.

(326) And on the day of Resurrection thou (Muhammad) seest those who lied concerning Allah with their faces blackened. Is not the home of the scorners in hell?

(327) And they esteem not Allah as He hath the right to be esteemed, when the whole earth is His handful on the day of Resurrection, and the heavens are rolled in His right hand. Glorified is He and High Exalted from all that they ascribe as partner (unto Him).

(328) And those who disbelieve are driven unto hell in troops till, when they reach it and the gates thereof are opened, and the warders thereof say unto them: Came there not unto you messengers of your own, reciting unto you the revelations of your Lord and warning you of the meeting of this your day? they say: Yea, verily. But the word of doom of disbelievers is fulfilled.

(329) And ward off from them ill-deeds; and he from whom Thou wardest off ill-deeds that day, him verily hast Thou taken into mercy. That is the supreme triumph.

(330) Lo! (on that day) those who disbelieve are informed by proclamation: Verily Allah's abhorrence is more terrible than your abhorrence one of another, when ye were called unto the faith but did refuse.