Well, the Hijri date 21 Ramadan 1400 corresponds to the Gregorian date Saturday, 2 August 1980. This date lies in the ninth month of the Hijri year 1400 AH, which is Ramadan of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1400/09/21 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 2 August 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Ramadan 1400 AH to its equivalent Gregorian date.
إِلَّا ٱلَّذِينَ تَابُوا۟ وَأَصْلَحُوا۟ وَبَيَّنُوا۟ فَأُو۟لَٰٓئِكَ أَتُوبُ عَلَيْهِمْ ۚ وَأَنَا ٱلتَّوَّابُ ٱلرَّحِيمُ
Except those who repent and amend and make manifest (the truth). These it is toward whom I relent. I am the Relenting, the Merciful.
Surah Al-Baqara(2:160)
Sahih al-Bukhari
Hajj (Pilgrimage)
Chapter: Rami of Jimar from the middle of the valley
Narrated `Abdur-Rahman bin Yazid:
`Abdullah, did the Rami from the middle of the valley. So, I said, "O, Abu `Abdur-Rahman! Some people do the Rami (of the Jamra) from above it (i.e. from the top of the valley)." He said, "By Him except whom none has the right to be worshipped, this is the place from where the one on whom Surat-al-Baqara was revealed (i.e. Allah's Messenger (ﷺ)) did the Rami."
Sahih al-Bukhari 1747