Many interpreters of this verse in the Holy Quran state that thousand months is Allah’s way of defining eternal time as it cannot be described in worldy time. A single moment of enlightenment of the Noor of Allah is better than a thousand months and such a moment of recognition converts the night into a period of Spiritual glory and majesty, and every one of us should try to work towards this.
When the night of spiritual darkness is removed by the Noor of Allah, a wonderful peace and sense of security arises in the soul which lasts until this physical life ends and the glorious day of the spiritual world dawns, when everything will be on a different plane and the nights and days of this world will seem less than a dream. This is the meaning of “until the rise of dawn” and not the literal interpretation as many may construe or understand it. Surely, Allah’s realm/time span is larger.
Allah has says in the Quran: Rise to pray in the night except a little (73:1)
Allah ordered Prophet Muhammad (salwaat) to spend most of the night in worship in order that his Lord may lift him to a higher elevation. Hazrat Ali (salwaat) and others would join him for the nightly meditation (Baitul Khayal) and would be rising up in station and spirituality: Surely We will make to descend on you a weighty Word. Surely the rising by night is the firmest way to tread and the best corrective of speech. (73, 1-5)