Well, the Hijri date 18 Dhul Qidah 1235 corresponds to the Gregorian date Saturday, 26 August 1820. This date lies in the eleventh month of the Hijri year 1235 AH, which is Dhu Al-Qidah of 1235 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1235/11/18 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 26 August 1820 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Dhul Qidah 1235 AH to its equivalent Gregorian date.
أَثُمَّ إِذَا مَا وَقَعَ ءَامَنتُم بِهِۦٓ ۚ ءَآلْـَٰٔنَ وَقَدْ كُنتُم بِهِۦ تَسْتَعْجِلُونَ
Is it (only) then, when it hath befallen you, that ye will believe? What! (Believe) now, when (until now) ye have been hastening it on (through disbelief)?
Surah Yunus(10:51)