Well, the Hijri date 18 Muharram 1390 corresponds to the Gregorian date Wednesday, 25 March 1970. This date lies in the first month of the Hijri year 1390 AH, which is Muharram of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1390/01/18 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 25 March 1970 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Muharram 1390 AH to its equivalent Gregorian date.
۞ أَوَلَمْ يَسِيرُوا۟ فِى ٱلْأَرْضِ فَيَنظُرُوا۟ كَيْفَ كَانَ عَٰقِبَةُ ٱلَّذِينَ كَانُوا۟ مِن قَبْلِهِمْ ۚ كَانُوا۟ هُمْ أَشَدَّ مِنْهُمْ قُوَّةًۭ وَءَاثَارًۭا فِى ٱلْأَرْضِ فَأَخَذَهُمُ ٱللَّهُ بِذُنُوبِهِمْ وَمَا كَانَ لَهُم مِّنَ ٱللَّهِ مِن وَاقٍۢ
Have they not travelled in the land to see the nature of the consequence for those who disbelieved before them? They were mightier than these in power and (in the) traces (which they left behind them) in the earth. Yet Allah seized them for their sins, and they had no protector from Allah.
Surah Ghafir(40:21)