Well, the Hijri date 13 Rabi Al Thani 1408 corresponds to the Gregorian date Friday, 4 December 1987. This date lies in the fourth month of the Hijri year 1408 AH, which is Rabi Al-Thani of 1408 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1408/04/13 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 4 December 1987 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Rabi Al Thani 1408 AH to its equivalent Gregorian date.
قُل لِّلْمُخَلَّفِينَ مِنَ ٱلْأَعْرَابِ سَتُدْعَوْنَ إِلَىٰ قَوْمٍ أُو۟لِى بَأْسٍۢ شَدِيدٍۢ تُقَٰتِلُونَهُمْ أَوْ يُسْلِمُونَ ۖ فَإِن تُطِيعُوا۟ يُؤْتِكُمُ ٱللَّهُ أَجْرًا حَسَنًۭا ۖ وَإِن تَتَوَلَّوْا۟ كَمَا تَوَلَّيْتُم مِّن قَبْلُ يُعَذِّبْكُمْ عَذَابًا أَلِيمًۭا
Say unto those of the wandering Arabs who were left behind: Ye will be called against a folk of mighty prowess, to fight them until they surrender; and if ye obey, Allah will give you a fair reward; but if ye turn away as ye did turn away before, He will punish you with a painful doom.
Surah Al-Fath(48:16)
Sahih al-Bukhari
Hajj (Pilgrimage)
Chapter: The Rami of the Jimar with seven small stones
Narrated `Abdur-Rahman bin Yazid:
When `Abdullah, reached the big Jamra (i.e. Jamrat-ul-Aqaba) he kept the Ka`ba on the left side and Mina on his right side and threw seven pebbles (at the Jamra) and said, "The one on whom Surat-al- Baqara was revealed (i.e. the Prophet) had done the Rami similarly."
Sahih al-Bukhari 1748