Well, the Hijri date 20 Jumada Al Oula 1287 corresponds to the Gregorian date Wednesday, 17 August 1870. This date lies in the fifth month of the Hijri year 1287 AH, which is Jumada Al-Awwal of 1287 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1287/05/20 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 17 August 1870 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Jumada Al Oula 1287 AH to its equivalent Gregorian date.
ذَٰلِكُمُ ٱللَّهُ رَبُّكُمْ ۖ لَآ إِلَٰهَ إِلَّا هُوَ ۖ خَٰلِقُ كُلِّ شَىْءٍۢ فَٱعْبُدُوهُ ۚ وَهُوَ عَلَىٰ كُلِّ شَىْءٍۢ وَكِيلٌۭ
Such is Allah, your Lord. There is no Allah save Him, the Creator of all things, so worship Him. And He taketh care of all things.
Surah Al-An'aam(6:102)