Well, the Hijri date 15 Jumada Al Oula 1399 corresponds to the Gregorian date Thursday, 12 April 1979. This date lies in the fifth month of the Hijri year 1399 AH, which is Jumada Al-Awwal of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1399/05/15 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 April 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Jumada Al Oula 1399 AH to its equivalent Gregorian date.
قُل لَّكُم مِّيعَادُ يَوْمٍۢ لَّا تَسْتَـْٔخِرُونَ عَنْهُ سَاعَةًۭ وَلَا تَسْتَقْدِمُونَ
Surah Saba(34:30)
Sahih al-Bukhari
To make the Heart Tender (Ar-Riqaq)
Chapter: The Fitnah of wealth should be warded off
'Ubayy said (referring to the hadith above), "We considered this as a saying from the Qur'an till the Surah (beginning with):
"The mutual rivalry (for piling up of worldly things) diverts you' (102:1) was revealed."
Sahih al-Bukhari 6440
