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

(151) Deem not that Allah is unaware of what the wicked do. He but giveth them a respite till a day when eyes will stare (in terror),

(152) And warn mankind of a day when the doom will come upon them, and those who did wrong will say: Our Lord! Reprieve us for a little while. We will obey Thy call and will follow the messengers. (It will be answered): Did ye not swear before that there would be no end for you?

(153) On the day when the earth will be changed to other than the earth, and the heavens (also will be changed) and they will come forth unto Allah, the One, the Almighty,

(154) Thou wilt see the guilty on that day linked together in chains,

(155) And lo! the curse shall be upon thee till the day of Judgment.

(156) He said: My Lord! Reprieve me till the day when they are raised.

(157) Till the day of appointed time.

(158) And He hath constrained the night and the day and the sun and the moon to be of service unto you, and the stars are made subservient by His command. Lo! herein indeed are portents for people who have sense.

(159) That they may bear their burdens undiminished on the day of Resurrection, with somewhat of the burdens of those whom they mislead without knowledge. Ah! evil is that which they bear!

(160) Then on the day of Resurrection He will disgrace them and will say: Where are My partners, for whose sake ye opposed (My guidance)? Those who have been given knowledge will say: Disgrace this day and evil are upon the disbelievers,