Well, the Hijri date 15 Rabi Al Thani 1399 corresponds to the Gregorian date Tuesday, 13 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 Tuesday without any doubt. The Arabic date 1399/04/15 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 13 March 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1399 AH to its equivalent Gregorian date.
لَّا يُصَدَّعُونَ عَنْهَا وَلَا يُنزِفُونَ
Wherefrom they get no aching of the head nor any madness,
Surah Al-Waaqia(56:19)
Sahih al-Bukhari
Hajj (Pilgrimage)
Chapter: To shave the head and to have the head-hair cut short on finishing the Ihram
Narrated `Abdullah:
The Prophet (ﷺ) and some of his companions got their heads shaved and some others got their hair cut short.
Sahih al-Bukhari 1729