Well, the Hijri date 23 Ramadan 1408 corresponds to the Gregorian date Monday, 9 May 1988. This date lies in the ninth month of the Hijri year 1408 AH, which is Ramadan of 1408 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1408/09/23 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 9 May 1988 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Ramadan 1408 AH to its equivalent Gregorian date.
أَفَلَمْ يَسِيرُوا۟ فِى ٱلْأَرْضِ فَيَنظُرُوا۟ كَيْفَ كَانَ عَٰقِبَةُ ٱلَّذِينَ مِن قَبْلِهِمْ ۚ كَانُوٓا۟ أَكْثَرَ مِنْهُمْ وَأَشَدَّ قُوَّةًۭ وَءَاثَارًۭا فِى ٱلْأَرْضِ فَمَآ أَغْنَىٰ عَنْهُم مَّا كَانُوا۟ يَكْسِبُونَ
Have they not travelled in the land to see the nature of the consequence for those before them? They were more numerous than these, and mightier in power and (in the) traces (which they left behind them) in the earth. But all that they used to earn availed them not.
Surah Ghafir(40:82)