Well, the Hijri date 21 Dhul Qidah 1287 corresponds to the Gregorian date Saturday, 11 February 1871. This date lies in the eleventh month of the Hijri year 1287 AH, which is Dhu Al-Qidah of 1287 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1287/11/21 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 11 February 1871 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Qidah 1287 AH to its equivalent Gregorian date.
يَٰٓأَيُّهَا ٱلنَّبِىُّ قُل لِّأَزْوَٰجِكَ وَبَنَاتِكَ وَنِسَآءِ ٱلْمُؤْمِنِينَ يُدْنِينَ عَلَيْهِنَّ مِن جَلَٰبِيبِهِنَّ ۚ ذَٰلِكَ أَدْنَىٰٓ أَن يُعْرَفْنَ فَلَا يُؤْذَيْنَ ۗ وَكَانَ ٱللَّهُ غَفُورًۭا رَّحِيمًۭا
O Prophet! Tell thy wives and thy daughters and the women of the believers to draw their cloaks close round them (when they go abroad). That will be better, so that they may be recognised and not annoyed. Allah is ever Forgiving, Merciful.
Surah Al-Ahzaab(33:59)