Our Prophet Mohammed (peace be upon him) highlighted this Sura
The Surat Al-Kahf contains signs and secrets about the endtimes
The Surat Al-Kahf tells about the extraordinary situation of the People of the Cave
The Surat Al-Kahf contains important clues about the signs of Doomsday
Only God and a handful of people knew their number
How long the people of the cave stayed there
The story about the Prophets Musa and Al-Khidr
The Surat Al-Kahf gives vital information about the Prophet Dhu'i-Qarnayn
The numerical values (EBCED) in some of the verses in the surat Al-Kahf point to times very close to our own day

THE SURAT AL-KAHF CONTAINS IMPORTANT CLUES ABOUT THE SIGNS OF DOOMSDAY

Thus did We make their case known to the people, that they might know that the promise of Allah is true, and that there can be no doubt about the Hour of Judgment. Behold, they argued amongst themselves as to their affair, and some said, "Construct a building over them": Their Lord knows best about them. Those who prevailed in their affair said, "Let us surely build a place of worship (masjid) over them." (Surat al-Kahf, 21)

That the dwellers in the Cave are found by outside people might be a sign that good people will eventually meet each other and that, even if widely scattered and separated geographically, they will one day be rejoined.


ONLY GOD AND A HANDFUL OF PEOPLE KNEW THEIR NUMBER

“(Some) say they were three, the dog being the fourth among them; (others) say they were five, the dog being the sixth, doubtfully guessing at the unknown; (yet others) say they were seven, the dog being the eighth. Say thou: "My Lord best knows their number; none but a few knows them." Enter not, therefore, into controversies concerning them, except on a matter that is clear, and do not question concerning them any of them.” (Surat al-Kahf, 22)

he statement in this verse, “None but a few knows them” indicates that only a handful of people can actually know this figure. For instance, one of these few people could be the Prophet Al-Khidr. Disciples of Al-Khidr, too, can obtain this information if God wishes it so and presents it to them. Likewise, in the Qur’an we see that some exemplars gained information about the unseen world by virtue of God revealing this information to them.

The phrase at the end of this verse, “Enter not, therefore, into controversies surrounding them,” sets out what discussions are suitable for the Qur’an. When discussing any matter, believers should try to present evidence from the Qur’an. Those who deny religion do just the opposite. Their only goal is to start an argument and therefore display their enmity towards religion and believers alike. In the Qur’an, God says that some people give godless examples for the “sole purpose of starting a discussion” (Surat Az-Zukhruf, 58)

“Do not question concerning them any of them” means that believers should not respect any information other than what is revealed to them by God, for God knows the unseen world. Erroneous stories told by people based upon their comments and guesses have no value in the eyes of a true believer. Therefore this verse forbids people from giving any weight to made-up stories which are told by one person to another and whose source is unknown.


HOW LONG THE PEOPLE OF THE CAVE STAYED THERE

"And they remained in their cave for three hundred years and (some) add (another) nine. Say: "Allah knows best how long they stayed: with Him is (the knowledge of) the secrets of the heavens and the earth: how clearly He sees, how finely He hears (everything)! They have no protector other than Him; nor does He share His Command with any person whatsoever." (Surat al-Kahf, 25-26)

This verse tells us that the people of the Cave spent 300 years there. Soon before they were awoken, this period was extended by another additional nine years, thus making a total of 309 years.