The word(s) "day" appears 568 time(s) in 513 verse(s) in Quran in Muhammad Pickthal translation.

(161) By Allah, We verily sent messengers unto the nations before thee, but the devil made their deeds fairseeming unto them. So he is their patron this day, and theirs will be a painful doom.

(162) And Allah hath given you in your houses an abode, and hath given you (also), of the hides of cattle, houses which ye find light (to carry) on the day of migration and on the day of pitching camp; and of their wool and their fur and their hair, caparison and comfort for a while.

(163) And (bethink you of) the day when we raise up of every nation a witness, then there is no leave for disbelievers, nor are they allowed to make amends.

(164) And they proffer unto Allah submission on that day, and all that they used to invent hath failed them.

(165) And (bethink you of) the day when We raise in every nation a witness against them of their own folk, and We bring thee (Muhammad) as a witness against these. And We reveal the Scripture unto thee as an exposition of all things, and a guidance and a mercy and good tidings for those who have surrendered (to Allah).

(166) And be not like unto her who unravelleth the thread, after she hath made it strong, to thin filaments, making your oaths a deceit between you because of a nation being more numerous than (another) nation. Allah only trieth you thereby, and He verily will explain to you on the day of Resurrection that wherein ye differed.

(167) On the day when every soul will come pleading for itself, and every soul will be repaid what it did, and they will not be wronged.

(168) The Sabbath was appointed only for those who differed concerning it, and lo! thy Lord will judge between them on the day of Resurrection concerning that wherein they used to differ.

(169) And We appoint the night and the day two portents. Then We make dark the portent of the night, and We make the portent of the day sight-giving, that ye may seek bounty from your Lord, and that ye may know the computation of the years, and the reckoning; and everything have We expounded with a clear expounding.

(170) And every man's augury have We fastened to his own neck, and We shall bring forth for him on the day of Resurrection a book which he will find wide open.