Well, the Hijri date 18 Rabi Al Thani 1421 corresponds to the Gregorian date Thursday, 20 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 Thursday without any doubt. The Arabic date 1421/04/18 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 20 July 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rabi Al Thani 1421 AH to its equivalent Gregorian date.
وَتَقَطَّعُوٓا۟ أَمْرَهُم بَيْنَهُمْ ۖ كُلٌّ إِلَيْنَا رَٰجِعُونَ
And they have broken their religion (into fragments) among them, (yet) all are returning unto Us.
Surah Al-Anbiyaa(21:93)
Sahih al-Bukhari
Funerals (Al-Janaa'iz)
Chapter: The order of following the funeral procession
Narrated Al-Bara' bin `Azib:
Allah's Messenger (ﷺ) ordered us to do seven things and forbade us to do other seven. He ordered us: to follow the funeral procession. to visit the sick, to accept invitations, to help the oppressed, to fulfill the oaths, to return the greeting and to reply to the sneezer: (saying, "May Allah be merciful on you," provided the sneezer says, "All the praises are for Allah,"). He forbade us to use silver utensils and dishes and to wear golden rings, silk (clothes), Dibaj (pure silk cloth), Qissi and Istabraq (two kinds of silk cloths).
Sahih al-Bukhari 1239