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

(291) Say (unto them): On the day of the victory the faith of those who disbelieve (and who then will believe) will not avail them, neither will they be reprieved.

(292) Verily in the messenger of Allah ye have a good example for him who looketh unto Allah and the Last day, and remembereth Allah much.

(293) Their salutation on the day when they shall meet Him will be: Peace. And He hath prepared for them a goodly recompense.

(294) On the day when their faces are turned over in the Fire, they say: Oh, would that we had obeyed Allah and had obeyed His messenger!

(295) And We set, between them and the towns which We had blessed, towns easy to be seen, and We made the stage between them easy, (saying): Travel in them safely both by night and day.

(296) Say (O Muhammad): Yours is the promise of a day which ye cannot postpone nor hasten by an hour.

(297) Those who were despised say unto those who were proud: Nay but (it was your) scheming night and day, when ye commanded us to disbelieve in Allah and set up rivals unto Him. And they are filled with remorse when they behold the doom; and We place carcans on the necks of those who disbelieved. Are they requited aught save what they used to do?

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

(299) That day ye will possess no use nor hurt one for another. And We shall say unto those who did wrong: Taste the doom of the Fire which ye used to deny.

(300) He maketh the night to pass into the day and He maketh the day to pass into the night. He hath subdued the sun and moon to service. Each runneth unto an appointed term. Such is Allah, your Lord; His is the Sovereignty; and those unto whom ye pray instead of Him own not so much as the white spot on a date-stone.