Now only 4 days are left in 21st December so we decided to present Islamic point of view about this issue.
Allah SWT says in the Holy Quran "Verily the knowledge of the Hour is with Allah Alone". Another verse of the Quran says "They ask thee about the final Hour; when will be its appointed time? Say: "The knowledge thereof is with my Lord Alone none but He can reveal as to when it will occur".
So these verses of Holy Quran makes it clear that only Allah SWT has the knowledge when this world will end and Judgement day will come not any human knows about it.
Moreover from Islamic point of view the World will only end after all the signs of Judgement day will appear in this world like Arrival of Mehdi, Return of Prophet Jesus A.S etc. these signs are not yet completed.
So it is clear that Only our Creator Allah SWT knows when this world will end? no human can make predication about it.