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

(171) "Till the day of the time appointed."

(172) But As-Saihah (torment - awful cry) overtook them in the early morning (of the fourth day of their promised punishment days).

(173) And He has subjected to you the night and the day, and the sun and the moon; and the stars are subjected by His Command. Surely, in this are proofs for people who understand.

(174) And landmarks (signposts during the day) and by the stars (during the night), they (mankind) guide themselves.

(175) They may bear their own burdens in full on the day of Resurrection, and also of the burdens of those whom they misled without knowledge. Evil indeed is that which they shall bear!

(176) Then, on the day of Resurrection, He will disgrace them and will say: "Where are My (so called) partners concerning whom you used to disagree and dispute (with the believers, by defying and disobeying Allah)?" Those who have been given the knowledge (about the Torment of Allah for the disbelievers) will say: "Verily! Disgrace and misery this day are upon the disbelievers.

(177) Do they (the disbelievers and polytheists) await but that the angels should come to them [to take away their souls (at death)], or there should come the command (i.e. the torment or the day of Resurrection) of your Lord? Thus did those before them. And Allah wronged them not, but they used to wrong themselves.

(178) By Allah, We indeed sent (Messengers) to the nations before you (O Muhammad صلى الله عليه و سلم), but Shaitan (Satan) made their deeds fair-seeming to them. So he (Satan) is their Wali (helper) today (i.e. in this world), and theirs will be a painful torment.

(179) And (remember) the day when We shall raise up from each nation a witness (their Messenger), then, those who disbelieved will not be given leave (to put forward excuses), nor will they be allowed (to return to the world) to repent and ask for Allah's Forgiveness (of their sins).

(180) And they will offer (their full) submission to Allah (Alone) on that day, and their invented false deities [all that they used to invoke besides Allah, e.g. idols, saints, priests, monks, angels, jinn, Jibril (Gabriel), Messengers] will vanish from them.