The Prophet ﷺ told 'Abdullah ibn 'Amr to complete the Quran in a month, and when he said he was able to do more he was told: "Then finish the recitation of the Quran in seven days, and do not finish it in less than that" (Sahih al-Bukhari 5054) — which is why many of the Salaf made a weekly khatmah their habit. He also said: "He who recites the Quran in less than three days does not understand it" (Sunan Abi Dawud 1394; Jami' al-Tirmidhi 2949, sahih) — so racing through the whole Quran in a day or two at the cost of understanding is contrary to the guidance, though some of the Salaf did increase their recitation in Ramadan, and a number of scholars read the limit as guidance for what is best rather than a binding prohibition. The principle is tadabbur over speed: Allah says "and recite the Quran with measured recitation" (Quran 73:4) and "so recite what is easy of it" (Quran 73:20). Choose a consistent daily portion you can sustain with reflection — a juz' a day already gives you a khatmah every month — for "the most beloved deed to Allah is the most constant, even if it is little" (Sahih al-Bukhari 6464).
Q&A · Quran
How often should I complete a full reading (khatmah) of the Quran, and is there a minimum time?
Evidence — the daleel
Quran 73:4Quran 73:20Sahih al-Bukhari 5054 ṢaḥīḥSunan Abi Dawud 1394Jami' al-Tirmidhi 2949Sahih al-Bukhari 6464 Ṣaḥīḥ
On deen2u
Informational, not a personal fatwa. Consult a qualified scholar for rulings on your situation.