Well, the Hijri date 4 Rajab 1235 corresponds to the Gregorian date Sunday, 16 April 1820. This date lies in the seventh month of the Hijri year 1235 AH, which is Rajab of 1235 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1235/07/04 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 16 April 1820 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Rajab 1235 AH to its equivalent Gregorian date.
وَيَسْـَٔلُونَكَ عَنِ ٱلْجِبَالِ فَقُلْ يَنسِفُهَا رَبِّى نَسْفًۭا
They will ask thee of the mountains (on that day). Say: My Lord will break them into scattered dust.
Surah Taa-Haa(20:105)