Well, the Hijri date 7 Rajab 1421 corresponds to the Gregorian date Wednesday, 4 October 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 Wednesday without any doubt. The Arabic date 1421/07/07 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 4 October 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 7 Rajab 1421 AH to its equivalent Gregorian date.
إِنَّا لَمَّا طَغَا ٱلْمَآءُ حَمَلْنَٰكُمْ فِى ٱلْجَارِيَةِ
Lo! when the waters rose, We carried you upon the ship
Surah Al-Haaqqa(69:11)
Sahih al-Bukhari
Knowledge
Chapter: The preaching (and teaching) of the (religious) knowledge to women by the Imam (Chief)
Narrated Ibn 'Abbas:
Once Allah's Messenger (ﷺ) came out while Bilal was accompanying him. He went towards the women thinking that they had not heard him (i.e. his sermon). So he preached them and ordered them to pay alms. (Hearing that) the women started giving alms; some donated their ear-rings, some gave their rings and Bilal was collecting them in the corner of his garment.
Sahih al-Bukhari 98