Well, the Hijri date 12 Rabi Al Awwal 1400 corresponds to the Gregorian date Tuesday, 29 January 1980. This date lies in the third month of the Hijri year 1400 AH, which is Rabi Al-Awwal of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1400/03/12 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 29 January 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Rabi Al Awwal 1400 AH to its equivalent Gregorian date.
فَأَلْقَىٰ عَصَاهُ فَإِذَا هِىَ ثُعْبَانٌۭ مُّبِينٌۭ
Then he flung down his staff and lo! it was a serpent manifest;
Surah Al-A'raaf(7:107)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
The Statement of Allah: "...and perfect His Favour on you and on the offspring of Ya'qub (Jacob)..." (V.12:6)
Narrated `Abdullah bin `Umar:
The Prophet (ﷺ) said, "The honorable, the son of the honorable the son of the honorable, i.e. Joseph, the son of Jacob, the son of Isaac, the son of Abraham."
Sahih al-Bukhari 4688