Well, the Hijri date 21 Jumada Al Oula 1402 corresponds to the Gregorian date Tuesday, 16 March 1982. This date lies in the fifth month of the Hijri year 1402 AH, which is Jumada Al-Awwal of 1402 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1402/05/21 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 16 March 1982 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Jumada Al Oula 1402 AH to its equivalent Gregorian date.
وَكَذَٰلِكَ أَوْحَيْنَآ إِلَيْكَ قُرْءَانًا عَرَبِيًّۭا لِّتُنذِرَ أُمَّ ٱلْقُرَىٰ وَمَنْ حَوْلَهَا وَتُنذِرَ يَوْمَ ٱلْجَمْعِ لَا رَيْبَ فِيهِ ۚ فَرِيقٌۭ فِى ٱلْجَنَّةِ وَفَرِيقٌۭ فِى ٱلسَّعِيرِ
And thus We have inspired in thee a Lecture in Arabic, that thou mayst warn the mother-town and those around it, and mayst warn of a day of assembling whereof there is no doubt. A host will be in the Garden, and a host of them in the Flame.
Surah Ash-Shura(42:7)