Well, the Hijri date 21 Jumada Al Oula 1137 corresponds to the Gregorian date Sunday, 4 February 1725. This date lies in the fifth month of the Hijri year 1137 AH, which is Jumada Al-Awwal of 1137 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1137/05/21 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 4 February 1725 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Jumada Al Oula 1137 AH to its equivalent Gregorian date.
وَقَالَ مُوسَىٰ رَبِّىٓ أَعْلَمُ بِمَن جَآءَ بِٱلْهُدَىٰ مِنْ عِندِهِۦ وَمَن تَكُونُ لَهُۥ عَٰقِبَةُ ٱلدَّارِ ۖ إِنَّهُۥ لَا يُفْلِحُ ٱلظَّٰلِمُونَ
And Moses said: My Lord is Best Aware of him who bringeth guidance from His presence, and whose will be the sequel of the Home (of bliss). Lo! wrong-doers will not be successful.
Surah Al-Qasas(28:37)