Well, the Hijri date 18 Jumada Al Oula 1408 corresponds to the Gregorian date Thursday, 7 January 1988. This date lies in the fifth month of the Hijri year 1408 AH, which is Jumada Al-Awwal of 1408 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1408/05/18 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 7 January 1988 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Jumada Al Oula 1408 AH to its equivalent Gregorian date.
وَعَلَى ٱلَّذِينَ هَادُوا۟ حَرَّمْنَا مَا قَصَصْنَا عَلَيْكَ مِن قَبْلُ ۖ وَمَا ظَلَمْنَٰهُمْ وَلَٰكِن كَانُوٓا۟ أَنفُسَهُمْ يَظْلِمُونَ
And unto those who are Jews We have forbidden that which We have already related unto thee. And We wronged them not, but they were wont to wrong themselves.
Surah An-Nahl(16:118)