Well, the Hijri date 18 Dhul Hijjah 1407 corresponds to the Gregorian date Wednesday, 12 August 1987. This date lies in the twelfth month of the Hijri year 1407 AH, which is Dhu Al-Hijjah of 1407 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1407/12/18 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 12 August 1987 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Dhul Hijjah 1407 AH to its equivalent Gregorian date.
وَإِذَا تُتْلَىٰ عَلَيْهِمْ ءَايَٰتُنَا قَالُوا۟ قَدْ سَمِعْنَا لَوْ نَشَآءُ لَقُلْنَا مِثْلَ هَٰذَآ ۙ إِنْ هَٰذَآ إِلَّآ أَسَٰطِيرُ ٱلْأَوَّلِينَ
And when Our revelations are recited unto them they say: We have heard. If we wish we can speak the like of this. Lo! this is naught but fables of the men of old.
Surah Al-Anfaal(8:31)