Well, the Hijri date 21 Rabi Al Awwal 1235 corresponds to the Gregorian date Thursday, 6 January 1820. This date lies in the third month of the Hijri year 1235 AH, which is Rabi Al-Awwal of 1235 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1235/03/21 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 6 January 1820 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Awwal 1235 AH to its equivalent Gregorian date.
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِذَا نُودِىَ لِلصَّلَوٰةِ مِن يَوْمِ ٱلْجُمُعَةِ فَٱسْعَوْا۟ إِلَىٰ ذِكْرِ ٱللَّهِ وَذَرُوا۟ ٱلْبَيْعَ ۚ ذَٰلِكُمْ خَيْرٌۭ لَّكُمْ إِن كُنتُمْ تَعْلَمُونَ
O ye who believe! When the call is heard for the prayer of the day of congregation, haste unto remembrance of Allah and leave your trading. That is better for you if ye did but know.
Surah Al-Jumu'a(62:9)