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

(221) We know very well what they will say, when the best among them in knowledge and wisdom will say: "You stayed no longer than a day!"

(222) On that day mankind will follow strictly (the voice of) Allah's caller, no crookedness (that is without going to the right or left of that voice) will they show him (Allah's caller). And all voices will be humbled for the Most Gracious (Allah), and nothing shall you hear but the low voice of their footsteps.

(223) On that day no intercession shall avail, except the one for whom the Most Gracious (Allah) has given permission and whose word is acceptable to Him.

(224) And (all) faces shall be humbled before (Allah), Al-Hayyul-Qayyum (the Ever Living, the One Who sustains and protects all that exists). And he who carried (a burden of) wrongdoing (i.e. he who disbelieved in Allah, ascribed partners to Him, and did deeds of His disobedience), will be indeed a complete failure (on that day).

(225) "But whosoever turns away from My Reminder (i.e. neither believes in this Qur'an nor acts on its teachings.) verily, for him is a life of hardship, and We shall raise him up blind on the day of Resurrection."

(226) (Allah) will say: "Like this: Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) came unto you, but you disregarded them (i.e. you left them, did not think deeply in them, and you turned away from them), and so this day, you will be neglected (in the Hell-fire, away from Allah's Mercy)."

(227) So bear patiently (O Muhammad صلى الله عليه وسلم) what they say, and glorify the praises of your Lord before the rising of the sun, and before its setting, and during some hours of the night, and at the ends of the day (an indication for the five compulsory congregational prayers), that you may become pleased (with the reward which Allah shall give you).

(228) They (i.e. the angels) glorify His Praises night and day, (and) they never slacken (to do so).

(229) And He it is Who has created the night and the day, and the sun and the moon, each in an orbit floating.

(230) Nay, it (the Fire or the day of Resurrection) will come upon them all of a sudden and will perplex them, and they will have no power to avert it nor will they get respite.