Well, the Hijri date 18 Shaban 1403 corresponds to the Gregorian date Monday, 30 May 1983. This date lies in the eighth month of the Hijri year 1403 AH, which is Shaban of 1403 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1403/08/18 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 30 May 1983 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Shaban 1403 AH to its equivalent Gregorian date.
ثَمَٰنِيَةَ أَزْوَٰجٍۢ ۖ مِّنَ ٱلضَّأْنِ ٱثْنَيْنِ وَمِنَ ٱلْمَعْزِ ٱثْنَيْنِ ۗ قُلْ ءَآلذَّكَرَيْنِ حَرَّمَ أَمِ ٱلْأُنثَيَيْنِ أَمَّا ٱشْتَمَلَتْ عَلَيْهِ أَرْحَامُ ٱلْأُنثَيَيْنِ ۖ نَبِّـُٔونِى بِعِلْمٍ إِن كُنتُمْ صَٰدِقِينَ
Eight pairs: Of the sheep twain, and of the goats twain. Say: Hath He forbidden the two males or the two females, or that which the wombs of the two females contain? Expound to me (the case) with knowledge, if ye are truthful.
Surah Al-An'aam(6:143)