Well, the Hijri date 13 Jumada Al Akhira 1399 corresponds to the Gregorian date Wednesday, 9 May 1979. This date lies in the sixth month of the Hijri year 1399 AH, which is Jumada Al-Thani of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1399/06/13 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 9 May 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Jumada Al Akhira 1399 AH to its equivalent Gregorian date.
يَوْمَ يُنفَخُ فِى ٱلصُّورِ فَتَأْتُونَ أَفْوَاجًۭا
A day when the trumpet is blown and ye come in multitudes,
Surah An-Naba(78:18)
Sahih al-Bukhari
Virtues of Prayer at Masjid Makkah and Madinah
Chapter: The superiority of offering As-Salat in the Mosque of Makkah and Al-Madina
Narrated Abu Huraira:
The Prophet (ﷺ) said, "Do not set out on a journey except for three Mosques i.e. Al-Masjid-AI-Haram, the Mosque of Allah's Messenger (ﷺ) , and the Mosque of Al-Aqsa, (Mosque of Jerusalem)."
Sahih al-Bukhari 1189