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

(411) Surely your Lord knows that you pass in prayer nearly two-thirds of the night, and (sometimes) half of it, and (sometimes) a third of it, and (also) a party of those with you; and Allah measures the night and the day. He knows that you are not able to do it, so He has turned to you (mercifully), therefore read what is easy of the Quran. He knows that there must be among you sick, and others who travel in the land seeking of the bounty of Allah, and others who fight in Allah's way, therefore read as much of it as is easy (to you), and keep up prayer and pay the poor-rate and offer to Allah a goodly gift, and whatever of good you send on beforehand for yourselves, you will find it with Allah; that is best and greatest in reward; and ask forgiveness of Allah; surely Allah is Forgiving, Merciful.

(412) That, at that time, shall be a difficult day,

(413) And the daybreak when it shines;

(414) And we used to call the day of judgment a lie;

(415) Nay! I swear by the day of resurrection.

(416) He asks: When is the day of resurrection?

(417) Man shall say on that day: Whither to fly to?

(418) With your Lord alone shall on that day be the place of rest.

(419) Man shall on that day be informed of what he sent before and (what he) put off.

(420) (Some) faces on that day shall be bright,