تفسير : (the day when man will call to mind) when the disbeliever, al-nadr ibn al-harith and his host, will remember and know (his (whole) endeavour) the works he did in his state of disbelief,
Jalāl al-Dīn al-Maḥallī
تفسير : the day when man will remember (yawma yatadhakkaru’l-insānu substitutes for idhā, ‘when’) his efforts, in the [life of the] world, in the way of good or evil,