Well, the Hijri date 20 Rabi Al Thani 1430 corresponds to the Gregorian date Thursday, 16 April 2009. This date lies in the fourth month of the Hijri year 1430 AH, which is Rabi Al-Thani of 1430 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1430/04/20 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 April 2009 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Rabi Al Thani 1430 AH to its equivalent Gregorian date.
فَإِن كَذَّبُوكَ فَقَدْ كُذِّبَ رُسُلٌۭ مِّن قَبْلِكَ جَآءُو بِٱلْبَيِّنَٰتِ وَٱلزُّبُرِ وَٱلْكِتَٰبِ ٱلْمُنِيرِ
And if they deny thee, even so did they deny messengers who were before thee, who came with miracles and with the Psalms and with the Scripture giving light.
Surah Aal-i-Imraan(3:184)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"...And sever your ties of kinship." (V.47:22)
Narrated Muawiya bin Abi Al-Muzarrad:
Allah's Messenger (ﷺ), said, "Recite if you wish: Would you then if you were given the authority." (47.22)
Sahih al-Bukhari 4832