Firstly, The Day of Judgement is the day when all human beings are resurrected and gathered on the levelled earth. This Day is Day when every human being is recompensed for what he/she was doing in the this world. There are many proofs for the coming of this Great and Treble Day. Among these proofs, we can see two of them:
1-Creation of human being– Who Creates human being from sperm drop? Who Transforms this lifeless sperm to lively human being? Let’s see sperm drop. It has no blood nor bone nor flesh. So Who transforms this white sperm to blood and then to little flesh, then to the bone? Can sperm be transformed by itself to blood or flesh or bone? There should be a Creator Who does these. That Creator is Allah. Allah says, in the interpretation of the following verse:
“O mankind! If you are in doubt about the Resurrection, then verily! We have created you (i.e. Adam) from dust, then from a Nutfah (mixed drops of male and female sexual discharge i.e. offspring of Adam), then from a clot (a piece of thick coagulated blood) then from a little lump of flesh, some formed and some unformed (miscarriage), that We may make (it) clear to you (i.e. to show you Our Power and Ability to do what We will). And We cause whom We will to remain in the wombs for an appointed term, then We bring you out as infants, then (give you growth) that you may reach your age of full strength. And among you there is he who dies (young), and among you there is he who is brought back to the miserable old age, so that he knows nothing after having known. And you see the earth barren, but when We send down water (rain) on it, it is stirred (to life), it swells and puts forth every lovely kind (of growth).” Suuratu Al-Hajj :5 (Muhsin Khan Translation)
After bones had become dust recreating is easy for Allah. Because He created human being first time from dust. Then He created other human being from lifeless sperm.
2-Oppression on the earth– all of us we know on the earth how many innocent people are being killed without any crime. The criminals are not being held responsible for their crime. Even they are dying without any judgement. So let us ask ourselves, “If the Day of Judgement doesn’t come, how do those wronged people get their due right? How do criminal people left without being punished for their crime? Can they be left without judgement? If they are left, there is no meaning for this life?” Allah says:
“And never think that Allah is unaware of what the wrongdoers do. He only delays them for a Day when eyes will stare [in horror].
Racing ahead, their heads raised up, their glance does not come back to them, and their hearts are void.” Suuratu Ibraahim 14:42-43
“Their eyes humbled, they will emerge from the graves as if they were locusts spreading,
Racing ahead toward the Caller. The disbelievers will say, “This is a difficult Day.” Suuratu Al-Qamar 54:7-8
“And they ask you about the mountains, so say, “My Lord will blow them away with a blast.
And He will leave the earth a level plain;
You will not see therein a depression or an elevation.”
That Day, everyone will follow [the call of] the Caller [with] no deviation therefrom, and [all] voices will be stilled before the Most Merciful, so you will not hear except a whisper [of footsteps].” Suuratu Taha 105-108