(As in the life of humankind, "days" and "nights" alternate in the world also.) We have made the night and the day two signs (manifesting the truth of God’s Power, Knowledge, and absolute sovereignty, and His grace on you). We have obscured the sign of the night (made it dark) and We have made the sign of the day illuminating (therefore a means for you) to see, that you may seek bounty from your Lord and that you may know the computation of (time) the years and the reckoning; We set out all things in clear detail.