Analysis of "Ashrat El Saa h" condition of emergence - in religious teachings

Faith in the incident " Ashrat El Saa’h " is the most important issues of religion and the pillars and principles of the Muslim faith. This event, contrary to conventional thinking, is not limited to a certain time period (Judgment Day), but based on the Quran and hadith as another example for this event is expected to emerge during the period of holding.
Allah in the Quran, through many verses in the way of either above meanings a state of " Ashrat El Saa’h " and gave explanation of both dedicated features. One of these features is the very thing called " Ashrat El Saa’h " or the "signs of approaching the reappearance of saviour" that in the eighteenth verse of Surah Muhammad, which sets the conditions for emergence of a saviour and advent of an ideal time. These signs to cite Quranic verses and traditions, reflect the events that occur before the first instance of ad hoc Ashrat El Saa’h, the period of holding the advent of Imam.
In this paper, alluding to the meaning of the word "Ashrat" and a brief account of interpreter's views on the interpretation of " Ashrat El Saa’h ", three issues will be discussed: 1. The term " Ashrat El Saa’h " or what is true instances of it in the Quran? 2. The examples of the " Ashrat El Saa’h " in the eighteenth verse of Surah Mohammad - to what point in the future it is concerned? 3. The reason why the " Ashrat El Saa’h " is explained in the verses and the hadiths it mean?