Well, the Hijri date 10 Rabi Al Thani 1399 corresponds to the Gregorian date Thursday, 8 March 1979. This date lies in the fourth month of the Hijri year 1399 AH, which is Rabi Al-Thani of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1399/04/10 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 8 March 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 10 Rabi Al Thani 1399 AH to its equivalent Gregorian date.
فَمَن يَعْمَلْ مِنَ ٱلصَّٰلِحَٰتِ وَهُوَ مُؤْمِنٌۭ فَلَا كُفْرَانَ لِسَعْيِهِۦ وَإِنَّا لَهُۥ كَٰتِبُونَ
Then whoso doeth some good works and is a believer, there will be no rejection of his effort. Lo! We record (it) for him.
Surah Al-Anbiyaa(21:94)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter
Narrated Ibn Shihab:
These were the battles of Allah's Messenger (ﷺ) (which he fought), and while mentioning (the Badr battle) he said, "While the corpses of the pagans were being thrown into the well, Allah's Messenger (ﷺ) said (to them), 'Have you found what your Lord promised true?" `Abdullah said, "Some of the Prophet's companions said, "O Allah's Messenger (ﷺ)! You are addressing dead people.' Allah's Messenger (ﷺ) replied, 'You do not hear what I am saying, better than they.' The total number of Muslim fighters from Quraish who fought in the battle of Badr and were given their share of the booty, were 81 men." Az-Zubair said, "When their shares were distributed, their number was 101 men. But Allah knows it better."
Sahih al-Bukhari 4026