The word(s) "day" appears 533 time(s) in 482 verse(s) in Quran in Muhammad Habib Shakir translation.

(271) On the day when their faces shall be turned back into the fire, they shall say: O would that we had obeyed Allah and obeyed the Apostle!

(272) And We made between them and the towns which We had blessed (other) towns to be easily seen, and We apportioned the journey therein: Travel through them nights and days, secure.

(273) Say: You have the appointment of a day from which you cannot hold back any while, nor can you bring it on.

(274) And those who were deemed weak shall say to those who were proud. Nay, (it was) planning by night and day when you told us to disbelieve in Allah and to set up likes with Him. And they shall conceal regret when they shall see the punishment; and We will put shackles on the necks of those who disbelieved; they shall not be requited but what they did.

(275) And on the day when He will gather them all together, then will He say to the angels: Did these worship you?

(276) So on that day one of you shall not control profit or harm for another, and We will say to those who were unjust: Taste the chastisement of the fire which you called a lie.

(277) He causes the night to enter in upon the day, and He causes the day to enter in upon the night, and He has made subservient (to you) the sun and the moon; each one follows its course to an appointed time; this is Allah, your Lord, His is the kingdom; and those whom you call upon besides Him do not control a straw.

(278) If you call on them they shall not hear your call, and even if they could hear they shall not answer you; and on the resurrection day they will deny your associating them (with Allah); and none can inform you like the One Who is Aware.

(279) And a sign to them is the night: We draw forth from it the day, then lo! they are in the dark;

(280) Neither is it allowable to the sun that it should overtake the moon, nor can the night outstrip the day; and all float on in a sphere.