Well, the Hijri date 4 Jumada Al Oula 1386 corresponds to the Gregorian date Saturday, 20 August 1966. This date lies in the fifth month of the Hijri year 1386 AH, which is Jumada Al-Awwal of 1386 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1386/05/04 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 20 August 1966 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Jumada Al Oula 1386 AH to its equivalent Gregorian date.
أَلَمْ تَرَ إِلَى ٱلَّذِى حَآجَّ إِبْرَٰهِۦمَ فِى رَبِّهِۦٓ أَنْ ءَاتَىٰهُ ٱللَّهُ ٱلْمُلْكَ إِذْ قَالَ إِبْرَٰهِۦمُ رَبِّىَ ٱلَّذِى يُحْىِۦ وَيُمِيتُ قَالَ أَنَا۠ أُحْىِۦ وَأُمِيتُ ۖ قَالَ إِبْرَٰهِۦمُ فَإِنَّ ٱللَّهَ يَأْتِى بِٱلشَّمْسِ مِنَ ٱلْمَشْرِقِ فَأْتِ بِهَا مِنَ ٱلْمَغْرِبِ فَبُهِتَ ٱلَّذِى كَفَرَ ۗ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّٰلِمِينَ
Bethink thee of him who had an argument with Abraham about his Lord, because Allah had given him the kingdom; how, when Abraham said: My Lord is He Who giveth life and causeth death, he answered: I give life and cause death. Abraham said: Lo! Allah causeth the sun to rise in the East, so do thou cause it to come up from the West. Thus was the disbeliever abashed. And Allah guideth not wrongdoing folk.
Surah Al-Baqara(2:258)