Well, the Hijri date 16 Shawwal 1403 corresponds to the Gregorian date Tuesday, 26 July 1983. This date lies in the tenth month of the Hijri year 1403 AH, which is Shawwal of 1403 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1403/10/16 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 26 July 1983 to its equivalent Arabic date.
The following is the conversion of the Arabic date 16 Shawwal 1403 AH to its equivalent Gregorian date.
أَوَلَمْ يَرَوْا۟ كَيْفَ يُبْدِئُ ٱللَّهُ ٱلْخَلْقَ ثُمَّ يُعِيدُهُۥٓ ۚ إِنَّ ذَٰلِكَ عَلَى ٱللَّهِ يَسِيرٌۭ
See they not how Allah produceth creation, then reproduceth it? Lo! for Allah that is easy.
Surah Al-Ankaboot(29:19)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter
Narrated `Ata' bin Abi Rabah:
`Ubaid bin `Umar and I visited `Aisha, and he asked her about the migration. She said, "There is no migration today. A believer used to flee with his religion to Allah and His Prophet for fear that he might be put to trial as regards his religion. Today Allah has rendered Islam victorious; therefore a believing one can worship one's Lord wherever one wishes. But there is Jihad (for Allah's Cause) and intentions." (See Hadith 42, in the 4th Vol. for its Explanation)
Sahih al-Bukhari 4312