Well, the Hijri date 15 Ramadan 1407 corresponds to the Gregorian date Wednesday, 13 May 1987. This date lies in the ninth month of the Hijri year 1407 AH, which is Ramadan of 1407 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1407/09/15 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 13 May 1987 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Ramadan 1407 AH to its equivalent Gregorian date.
وَمَن يَتَوَلَّ ٱللَّهَ وَرَسُولَهُۥ وَٱلَّذِينَ ءَامَنُوا۟ فَإِنَّ حِزْبَ ٱللَّهِ هُمُ ٱلْغَٰلِبُونَ
And whoso taketh Allah and His messenger and those who believe for guardian (will know that), lo! the party of Allah, they are the victorious.
Surah Al-Maaida(5:56)
Sahih al-Bukhari
Prophets
Chapter: The Statement of Allah Taa'la: "And to Thamud (people, We sent) their brother Salih..."
Narrated `Abdullah bin `Umar:
The people landed at the land of Thamud called Al-Hijr along with Allah's Messenger (ﷺ) and they took water from its well for drinking and kneading the dough with it as well. (When Allah's Messenger (ﷺ) heard about it) he ordered them to pour out the water they had taken from its wells and feed the camels with the dough, and ordered them to take water from the well whence the she-camel (of Prophet Salih) used to drink.
Sahih al-Bukhari 3379