Well, the Hijri date 21 Dhul Hijjah 1288 corresponds to the Gregorian date Friday, 1 March 1872. This date lies in the twelfth month of the Hijri year 1288 AH, which is Dhu Al-Hijjah of 1288 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1288/12/21 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 1 March 1872 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Hijjah 1288 AH to its equivalent Gregorian date.
إِذْ قَالَ لَهُمْ أَخُوهُمْ صَٰلِحٌ أَلَا تَتَّقُونَ
When their brother Salih said unto them: Will ye not ward off (evil)?
Surah Ash-Shu'araa(26:142)