Well, the Hijri date 25 Shaban 1411 corresponds to the Gregorian date Monday, 11 March 1991. This date lies in the eighth month of the Hijri year 1411 AH, which is Shaban of 1411 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1411/08/25 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 11 March 1991 to its equivalent Arabic date.
The following is the conversion of the Arabic date 25 Shaban 1411 AH to its equivalent Gregorian date.
خَلَقَ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضَ بِٱلْحَقِّ ۚ تَعَٰلَىٰ عَمَّا يُشْرِكُونَ
He hath created the heavens and the earth with truth. High be He Exalted above all that they associate (with Him).
Surah An-Nahl(16:3)