Well, the Hijri date 21 Jumada Al Oula 1377 corresponds to the Gregorian date Thursday, 12 December 1957. This date lies in the fifth month of the Hijri year 1377 AH, which is Jumada Al-Awwal of 1377 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1377/05/21 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 12 December 1957 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Jumada Al Oula 1377 AH to its equivalent Gregorian date.
يُولِجُ ٱلَّيْلَ فِى ٱلنَّهَارِ وَيُولِجُ ٱلنَّهَارَ فِى ٱلَّيْلِ وَسَخَّرَ ٱلشَّمْسَ وَٱلْقَمَرَ كُلٌّۭ يَجْرِى لِأَجَلٍۢ مُّسَمًّۭى ۚ ذَٰلِكُمُ ٱللَّهُ رَبُّكُمْ لَهُ ٱلْمُلْكُ ۚ وَٱلَّذِينَ تَدْعُونَ مِن دُونِهِۦ مَا يَمْلِكُونَ مِن قِطْمِيرٍ
He maketh the night to pass into the day and He maketh the day to pass into the night. He hath subdued the sun and moon to service. Each runneth unto an appointed term. Such is Allah, your Lord; His is the Sovereignty; and those unto whom ye pray instead of Him own not so much as the white spot on a date-stone.
Surah Faatir(35:13)