Well, the Hijri date 20 Rajab 1287 corresponds to the Gregorian date Saturday, 15 October 1870. This date lies in the seventh month of the Hijri year 1287 AH, which is Rajab of 1287 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1287/07/20 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 15 October 1870 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Rajab 1287 AH to its equivalent Gregorian date.
وَقَالَ ٱلَّذِينَ كَفَرُوا۟ لَوْلَا نُزِّلَ عَلَيْهِ ٱلْقُرْءَانُ جُمْلَةًۭ وَٰحِدَةًۭ ۚ كَذَٰلِكَ لِنُثَبِّتَ بِهِۦ فُؤَادَكَ ۖ وَرَتَّلْنَٰهُ تَرْتِيلًۭا
And those who disbelieve say: Why is the Qur'an not revealed unto him all at once? (It is revealed) thus that We may strengthen thy heart therewith; and We have arranged it in right order.
Surah Al-Furqaan(25:32)
