Well, the Hijri date 1 Rajab 1421 corresponds to the Gregorian date Thursday, 28 September 2000. This date lies in the seventh month of the Hijri year 1421 AH, which is Rajab of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1421/07/01 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 28 September 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Rajab 1421 AH to its equivalent Gregorian date.
وَمِنْهُم مَّن يَسْتَمِعُ إِلَيْكَ ۖ وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَن يَفْقَهُوهُ وَفِىٓ ءَاذَانِهِمْ وَقْرًۭا ۚ وَإِن يَرَوْا۟ كُلَّ ءَايَةٍۢ لَّا يُؤْمِنُوا۟ بِهَا ۚ حَتَّىٰٓ إِذَا جَآءُوكَ يُجَٰدِلُونَكَ يَقُولُ ٱلَّذِينَ كَفَرُوٓا۟ إِنْ هَٰذَآ إِلَّآ أَسَٰطِيرُ ٱلْأَوَّلِينَ
Of them are some who listen unto thee, but We have placed upon their hearts veils, lest they should understand, and in their ears a deafness. If they saw every token they would not believe therein; to the point that, when they come unto thee to argue with thee, the disbelievers say: This is naught else than fables of the men of old.
Surah Al-An'aam(6:25)
Sahih al-Bukhari
Funerals (Al-Janaa'iz)
Chapter: Hurrying up with the coffin
Narrated Abu Huraira:
The Prophet (ﷺ) said, "Hurry up with the dead body for if it was righteous, you are forwarding it to welfare; and if it was otherwise, then you are putting off an evil thing down your necks."
Sahih al-Bukhari 1315