The word(s) "day" appears 704 time(s) in 579 verse(s) in Quran in Mohsin Khan translation.

(311) And among His Signs is your sleep by night and by day, and your seeking of His Bounty. Verily, in that are indeed signs for a people who listen.

(312) Allah is He Who created you, then provided food for you, then will cause you to die, then (again) He will give you life (on the day of Resurrection). Is there any of your (so-called) partners (of Allah) that do anything of that? Glory be to Him! And Exalted be He above all that (evil) they associate (with Him).

(313) So set you (O Muhammad صلى الله عليه وسلم) your face (in obedience to Allah, your Lord) to the straight and right religion (Islamic Monotheism), before there comes from Allah a day which none can avert. On that day men shall be divided [(in two groups), a group in Paradise and a group in Hell].

(314) Look then at the effects (results) of Allah's Mercy: how He revives the earth after its death. Verily, that (Allah) (Who revived the earth after its death) shall indeed raise the dead (on the day of Resurrection), and He is Able to do all things.

(315) And on the day that the Hour will be established, the Mujrimun (criminals, disbelievers, polytheists, sinners) will swear that they stayed not but an hour - thus were they ever deluded [away from the truth (i.e. they used to tell lies and take false oaths, and turn away from the truth) in this life of the world)]

(316) And those who have been bestowed with knowledge and faith will say: "Indeed you have stayed according to the Decree of Allah, until the day of Resurrection: so this is the day of Resurrection, but you knew not."

(317) So on that day no excuse of theirs will avail those who did wrong (by associating partners in worship with Allah, and by denying the day of Resurrection), nor will they be allowed (then) to return to seek Allah's Pleasure (by having Islamic Faith with righteous deeds and by giving up polytheism, sins and crimes with repentance).

(318) See you not (O Muhammad صلى الله عليه وسلم) that Allah merges the night into the day (i.e. the decrease in the hours of the night are added to the hours of the day), and merges the day into the night (i.e. the decrease in the hours of day are added to the hours of night), and has subjected the sun and the moon, each running its course for a term appointed; and that Allah is All-Aware of what you do.

(319) O mankind! Be afraid of your Lord (by keeping your duty to Him and avoiding all evil), and fear a day when no father can avail aught for his son, nor a son avail aught for his father. Verily, the Promise of Allah is true: let not then this (worldly) present life deceive you, nor let the chief deceiver (Satan) deceive you about Allah.

(320) Allah it is He Who has created the heavens and the earth, and all that is between them in six days. Then He rose over (Istawa ) the Throne (in a manner that suits His Majesty). You (mankind) have none, besides Him, as a Wali (protector or helper) or an intercessor. Will you not then remember (or receive admonition)?