THE RULING ON RECITING SURAH AL-KAHF ON FRIDAY
Question:
What is the ruling on reciting Surah Al-Kahf on Friday during the day and night?
Answer:
The recitation of Surah Al-Kahf on Friday is a preferred act and there is merit in it ... and there is no difference between a person reciting it from the Book, or by heart ... and the day, according to the Islamic law, is from the time of sunrise until sunset ... and based upon this, if a person recites it after the Friday prayer, he will receive the reward for it.
Shaykh Muhammad bin Saalih al-`Uthaymeen
Fatawa Islamiyah Vol. 2 Page 477