Today, the relativity of time is a proven scientific fact. This was revealed by Einstein's theory of relativity at the early years of the 20th century. Until then, people did not know that time was a relative concept, and that it could change according to the environment. Yet, the great scientist Albert Einstein openly proved this fact with the theory of relativity. He showed that time is dependent on mass and velocity. In the history of humanity, no one had expressed this fact clearly before.

With one exception though; the Qur'an included information about time's being relative! Some verses about the subject read:

"They ask you to hasten the punishment. God will not break His promise. A day with your Lord is equivalent to a thousand years in the way you count."

(The Qur'an, 22:47)

"He directs the whole affair from heaven to earth. Then it will again ascend to Him on a Day whose length is a thousand years by the way you measure."

(The Qur'an, 32:5)

"The angels and the Spirit ascend to Him in a day whose length is fifty thousand years."

(The Qur'an, 70:4)

In some verses, it is indicated that people perceive time differently and that sometimes people can perceive a very short period of time as a very lengthy one. The following conversation of people held during their judgment in the Hereafter is a good example of this:

"He will say, 'How many years did you tarry on the earth?' They will say, 'We tarried there for a day or part of a day. Ask those able to count!' He will say, 'You only tarried there for a little while if you did but know!"

(The Qur'an, 23:112-114)

The fact that the relativity of time is so clearly mentioned in the Qur'an, which started to be revealed in 610, is evidence that it is a holy book.

Any repetition in the Quran of an Ayah requires special attention. The Quran includes over 700 verses that deal with scientific miracles. In our present time, some of these verses are understood, and some are not. This is because the Quran is a challenge to humanity throughout the generations until the end of the physical world. This challenge in no way represents a negative process, but a positive one that keeps humanity reflecting on the many miraculous signs of God.
Vibration and Earth:

There are two Ayaat, with almost the same words, that relate the earth to rain and oscillation. Translations and commentaries of the Quran do not exactly explain this relationship. However, we will attempt to explore this link. The following argument may shed some light on the exact meaning of this relationship. And Allah knows the best.

Vibrations occur regularly in our surroundings. These are motions that repeat themselves. There are oscillating guitar strings, bells, diaphragms in telephones and speaker systems, and quartz crystals in wristwatches. Less obvious are the oscillations of the molecules of the air that transmit the sensation of sound, of the atoms in a solid that convey the sensation of temperature and of the electrons in the antenna of radio and TV transmitters.

Vibration is divided into free and forced vibration. A person swinging in a swing without any other help is an example of free vibration. If a friend keeps on pulling or pushing the swing periodically, we have a forced vibration. Free vibration happens if the friend pulls or pushes once and then the swing is left to oscillate freely.
One important property of oscillatory motion is its natural frequency, or the number of oscillations that are completed in one second. Any system has one or more natural frequencies of vibration depending upon its mass and how stiff it is. Resonance happens when a system is excited at one of its natural frequencies. The amplification of the sound from a radio is a case of resonance. When you move the station selector to get a certain station, you are actually bringing the frequency of the circuit in the radio in balance with the signal frequency of the selected station. When that happens, you get the maximum amplification of the sound. When you move the station selector, i.e. changing the circuit frequency from the input frequency, the sound decreases and then disappear.

Allah defined precisely this case of forced vibration where an input with driving frequency causes plants to grow as follows:

Surah 22, Ayah 5 "...And (further) you see the earth barren and lifeless, but when We pour down rain on it, it is stirred (to life), (oscillates), it swells, And it puts forth every kind of beautiful growth (in pairs)."

Surah 41, Ayah 39 "And among His Signs in this: thou seest the earth barren and desolate; but when We send down rain to it, it is stirred to life (oscillates) and yields increase. Truly, He Who gives life to the (dead) earth can surely give life to (men) who are dead. For He has power over all things."

The existing translation refers to the Arabic word "oscillate" as "it is stirred" which does not reflect the actual Arabic word. A possible explanation of the above phenomenon is that when rain drops on the dead ground, it oscillates and grows. If there are seeds in the ground, rain causes them to grow or germinate. The exact mechanism of the effect of rain on germination may not be fully understood. However, this may be left to specialists in the field of botany to examine from the point of view of vibration.
Regardless of discovering the exact mechanism of the above phenomenon, the above Ayaat clearly describe a case of vibration. Understanding this phenomenon of vibration is undoubtedly a knowledge that was not available in the seventh century, and may not be fully understood in our present time. No one can claim that Muhammad was a master dynamist and knew about vibration. Where did he get this information? It is from the Master and Only Creator of vibration.

The Relativity of the Time:

There is absolutely no ambiguity whatsoever in the Biblical description of the Creation in six days followed by a day of rest, the Sabbath, analogous to the days of the earthly week. This clearly shows the interjection of human concepts to a divine action. The word "day", in the Bible, means the interval of time between two successive sunrises or sunsets for an inhabitant of the earth. When defined this way, the day is conditioned to the rotation of the earth on its own axis. It is obvious that, logically speaking, there can be no such definition of "days" as explained in the Bible, if the mechanism that caused them to appear - the existence of the earth and the sun - had not already been created.
On the other hand, we read in the Quran in many Ayaat, the Creation process in six days without any analogy to the earthly days. To understand what the Quran means by a day, one should put all the verses in which the word "day" is mentioned and then attempt to extract a common meaning.

Surah 7, Ayah 54 “Your Guardian-Lord is Allah, Who created the heavens and the earth in six days”

Surah 32, Ayah 5 "He directs the affairs from heavens to the earth; then it ascends unto Him on a day, the measure of which is (as) a thousand years of your reckoning"

Surah 70, Ayah 4 "The angels and the Spirit (Gabriel) ascend unto Him in a day, the measure whereof is (as) fifty thousand years."

How could the immense mystery of time be enforced in our minds better than that? A day in the standard of Allah may be one day, or 1,000 years, or 50,000 years, depending on the event, relative to the human standard of time!
According to the theory of relativity, the time change of a fast moving object is very real and has nothing to do with any mechanical change that takes place in a clock because of its motion. An example to understand this time change is to imagine an astronaut traveling in space at a speed close to the speed of light. It would appear to him that he traveled an incredibly large distance in a very short time. On his return back to earth, he would find that thousands of earthly years had passed, and many generations had been born and died during this time expansion, while he might still be middle aged!
The relativity theory postulates that the maximum speed attainable is that of the speed of light. But who would say that this is really a fact that can be applied on all conditions? What if the speed of light represents a singularity or a barrier between two classes of realities? Our physical reality goes from zero speed to the speed of light. And beyond this barrier, there may be another reality that has speed range from the speed of light to, perhaps, a much faster speed.
During a dream one can travel enormous distances in a very short period of time, may be at a speed faster than the speed of light. So the above Ayaat describe that on a spiritual level something that takes one day, according to the Divine Standard, could take a thousand or fifty thousands years according to the human standard. Therefore, the day in the Quran signifies a period of time and may not be equal to the earthly 24 hours. Modern commentators of the Quran, such as Yusuf Ali (1934) stressed the importance of taking the word "day" to mean in reality "very long period, or Ages, or Eons."
How were the different events in the Quran described in different time frames? Who told Muhammad that time has a relativistic property? It is the Creator of time itself.