The chronology of this Sura has no significance. It is probably Meccan, though some hold that it was revealed in Medina.
The subject matter is the mystic Night of Power (or Honor), in which Revelation comes down to a benighted world, -- it may be to the wonderful Cosmos of an individual -- and transforms the conflict of wrongdoing into Peace and Harmony -- through the agency of the angelic host, representing the spiritual powers of the Mercy of Allah.
C.277-(Verses 1 to 5)-Blessed indeed is the Night of Power! -- When the Mercy of Allah's Revelation breaks through the darkness of the human soul! All the Powers, of the world divine, speed on their mystic Message of Mercy, by Allah's command, and bless every nook and corner of the heart! All jars are stilled in the reign supreme of Peace, until this mortal night gives place to the glorious day of an immortal world!
97:1 SURA 97. Qadr, or The Night of Power (or Honor). In the name of Allah, Most Gracious, Most Merciful. We have indeed revealed this (Message) in the Night of Power:
97:2 And what will explain to thee what the Night of Power is?
97:3 The Night of Power is better than a thousand Months.
97:4 Therein come down the angels and the Spirit by Allah's permission, on every errand: