Well, the Hijri date 29 Rabi Al Thani 1400 corresponds to the Gregorian date Sunday, 16 March 1980. This date lies in the fourth month of the Hijri year 1400 AH, which is Rabi Al-Thani of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1400/04/29 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 16 March 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 29 Rabi Al Thani 1400 AH to its equivalent Gregorian date.
وَلَوْ عَلِمَ ٱللَّهُ فِيهِمْ خَيْرًۭا لَّأَسْمَعَهُمْ ۖ وَلَوْ أَسْمَعَهُمْ لَتَوَلَّوا۟ وَّهُم مُّعْرِضُونَ
Had Allah known of any good in them He would have made them hear, but had He made them hear they would have turned away, averse.
Surah Al-Anfaal(8:23)
Sahih al-Bukhari
Holding Fast to the Qur'an and Sunnah
Chapter: The religious learned men should not differ
Narrated Anas bin Malik:
The Mountain of Uhud came in sight of Allah's Messenger (ﷺ) who then said, "This is a mountain that loves us and is loved by us. O Allah! Abraham made Mecca a sanctuary and I make the area between its (Medina's) two mountains a sanctuary."
Sahih al-Bukhari 7333