Well, the Hijri date 1 Rabi Al Thani 1421 corresponds to the Gregorian date Monday, 3 July 2000. This date lies in the fourth month of the Hijri year 1421 AH, which is Rabi Al-Thani of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1421/04/01 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 3 July 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Rabi Al Thani 1421 AH to its equivalent Gregorian date.
مَّا كَانَ مُحَمَّدٌ أَبَآ أَحَدٍۢ مِّن رِّجَالِكُمْ وَلَٰكِن رَّسُولَ ٱللَّهِ وَخَاتَمَ ٱلنَّبِيِّۦنَ ۗ وَكَانَ ٱللَّهُ بِكُلِّ شَىْءٍ عَلِيمًۭا
Muhammad is not the father of any man among you, but he is the messenger of Allah and the Seal of the Prophets; and Allah is ever Aware of all things.
Surah Al-Ahzaab(33:40)
Sahih al-Bukhari
Virtues of Madinah
Chapter: Al-Madina is also called Taba
Narrated Abu Humaid:
We came with the Prophet (ﷺ) from Tabuk, and when we reached near Medina, the Prophet (ﷺ) said, "This is Tabah."
Sahih al-Bukhari 1872