The Qur’an was revealed in Lailat-ul-Qadr, a night greater than a thousand months. This night is mentioned explicitly in Surah Al-Qadr, where Allah says: "Indeed, We sent the Qur’an down during the Night of Decree." (Surah Al-Qadr: 1). Lailat-ul-Qadr occurs in the last ten nights of Ramadan, often associated with the 27th night.

Muslims believe that this night holds immense spiritual significance, as the Qur’an—the ultimate source of guidance for humanity—was sent down from the Preserved Tablet (Lawh al-Mahfuz) to the lowest heaven and then gradually revealed to the Prophet Muhammad (SAW) over 23 years.

Lailat-ul-Qadr is a night filled with divine mercy, peace, and blessings. Worship, supplication, and recitation of the Qur’an during this night are encouraged, as its reward is multiplied greatly. The Prophet (SAW) urged his followers to seek this night in the odd nights of the last ten days of Ramadan, emphasizing its unmatched value.

This event marks the beginning of the final revelation from Allah, which revolutionized human thought, ethics, law, and spirituality. It’s a night where destinies are written for the year, and sincere prayers are accepted. That’s why Muslims worldwide engage in night-long worship, hoping to witness its barakah (blessings) and forgiveness.

Thus, the correct answer is Lailat-ul-Qadr, also known as the Night of Power or Destiny.