Day
The triliteral root yā wāw mīm (ي و م) occurs in the Quran 405 times.
Day - Arabic. الْيَوْم, al-yaum, not to be confused with light day - noon - arab. النَّهَار, al-nahar.
Contents
Chronology
Day 1: The protoplanetary stage of the Earth's development.
Day 2: Cryptozoic Eon. Archaeozoic Era.
Day 3: Proterozoic Eon.
Day 4: Phanerozoic Eon. Paleozoic Era.
Day 5: Mesozoic and Cenozoic Era.
Day 6: Quaternary (Anthropogenic) Period.
Geochronological arrow (scale) of time
First mention
Day...
(3:30) Day (Arab. يَوْمَ, yawma) when every person will find what good it had done present, and what bad it had done; it wishes that between them was a great distance. God warns you of Himself, and God is Kind towards the servants.
Relativity of time
(22:47) They seek you to hasten the retribution; and God will not break His promise. A day (Arab. يَوْمًا, yawman) with your Lord is like one thousand of the years you count.
(32:5) He arranges matters from the heaven to the earth, and then it ascends to Him in a day (Arab. يَوْمٍ, yawmin) which is equivalent to one thousand of the years which you count.
(70:4) The angels and the Spirit ascend to Him in a day (Arab. يَوْمٍ, yawmin) which is equivalent to fifty Thousand years.
Constitution day
(32:25) Indeed Your lord will facilitate between them (on) the day of Constitution regarding what they disputed in.