Well, the Hijri date 17 Dhul Hijjah 1509 corresponds to the Gregorian date Sunday, 28 July 2086. This date lies in the twelfth month of the Hijri year 1509 AH, which is Dhu Al-Hijjah of 1509 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1509/12/17 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 28 July 2086 to its equivalent Arabic date.
The following is the conversion of the Arabic date 17 Dhul Hijjah 1509 AH to its equivalent Gregorian date.
وَمَا كَانَ صَلَاتُهُمْ عِندَ ٱلْبَيْتِ إِلَّا مُكَآءًۭ وَتَصْدِيَةًۭ ۚ فَذُوقُوا۟ ٱلْعَذَابَ بِمَا كُنتُمْ تَكْفُرُونَ
And their worship at the (holy) House is naught but whistling and hand-clapping. Therefore (it is said unto them): Taste of the doom because ye disbelieve.
Surah Al-Anfaal(8:35)