Well, the Hijri date 25 Rajab 1400 corresponds to the Gregorian date Sunday, 8 June 1980. This date lies in the seventh month of the Hijri year 1400 AH, which is Rajab of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1400/07/25 is calculated using the Umm Al-Qura calendar and the sighting of the moon. One thing to remember is that this Arabic date may occur on different Gregorian date depending upon the region and country and obviously the moon.
If you are still not sure about the date then you can use our Arabic date converter.
The following is the conversion of the Gregorian date 8 June 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 25 Rajab 1400 AH to its equivalent Gregorian date.
كَلَّآ إِنَّ كِتَٰبَ ٱلْفُجَّارِ لَفِى سِجِّينٍۢ
Nay, but the record of the vile is in Sijjin -
Surah Al-Mutaffifin(83:7)
Sahih al-Bukhari
Holding Fast to the Qur'an and Sunnah
Chapter: Judging made on the basis of opinion or Qiyas
Narrated `Abdullah bin `Amr:
I heard the Prophet (ﷺ) saying, "Allah will not deprive you of knowledge after he has given it to you, but it will be taken away through the death of the religious learned men with their knowledge. Then there will remain ignorant people who, when consulted, will give verdicts according to their opinions whereby they will mislead others and go astray."
Sahih al-Bukhari 7307