The word(s) "when" appears 916 time(s) in 828 verse(s) in Quran in Mohsin Khan translation.

(771) That will be a Day when they shall not speak (during some part of it),

(772) And when it is said to them: "Bow down yourself (in prayer)!" They bow not down (offer not their prayers).

(773) The Day when the Trumpet will be blown, and you shall come forth in crowds (groups after groups). [Tafsir At-Tabari]

(774) Verily, We have warned you of a near torment - the Day when man will see that (the deeds) which his hands have sent forth, and the disbeliever will say: "Woe to me! Would that I were dust!"

(775) On the Day (when the first blowing of the Trumpet is blown), the earth and the mountains will shake violently (and everybody will die).

(776) when behold, they find themselves on the surface of the earth alive after their death,

(777) when his Lord called him in the sacred valley of Tuwa,

(778) But when there comes the greatest catastrophe (i.e. the Day of Recompense) -

(779) The Day when man shall remember what he strove for.

(780) They ask you (O Muhammad صلى الله عليه وسلم) about the Hour - when will be its appointed time?