In the name of Allah the Most Gracious the Most Merciful
Best time to recite Suratul Kahf
By Shaykh Muhammad bin Saalih al-’Uthaymeen may Allah have mercy on him
Question: If one recites suratul Kahf during the night of Jumu’ah (after maghrib on Thursday) do they receive the reward of reciting surah Kahf?
Answer: No, reciting suratul Kahf is done on the day of Jumu’ah, and the best time to recite it is after the sun has risen. From the time when the sun rises up until the sun sets. If (suratul Kahf) is recited during any hour between the sun rising and the sun setting then the reward is met.
This answer can be understood from the ahadith:
من قرأ سورة الكهف في يوم الجمعة أضاء له من النور ما بين الجمعتين
“Whoever reads Surah al-Kahf on the day of Jumu’ah, will have a light that will shine from him from one Friday to the next.”
(Narrated by al-Haakim, 2/399; al-Bayhaqi, 3/249. Ibn Hajar said in Takhreej al-Adhkaar that this is a hasan hadeeth, and he said, this is the strongest report that has been narrated concerning readingSoorat al-Kahf. See: Fayd al-Qadeer, 6/198. It was classed as saheeh by Shaykh al-Albaani in Saheeh al-Jaami’, 6470)
It was narrated that Ibn ‘Umar (may Allaah be pleased with him) said: “The Messenger of Allaah (peace and blessings of Allaah be upon him) said:
من قرأ سورة الكهف في يوم الجمعة سطع له نور من تحت قدمه إلى عنان السماء يضيء له يوم القيامة ، وغفر له ما بين الجمعتين
‘Whoever reads Surah al-Kahf on the day of Jumu’ah, a light will shine for him from beneath his feet to the clouds of the sky, which will shine for him on the Day of Resurrection, and he will be forgiven (his sins) between the two Fridays.’”
Al-Mundhiri said, this was narrated by Abu Bakr ibn Mardawayh in his Tafseer, with an isnaad with which there was nothing wrong.
(al-Targheeb wa’l-Tarheeb, 1/298)
Source: Silsilatul Liqaail Shahree 
Translated by: Abu Awzaa’ee AbdusSalaam
الفقير الى الله