Well, the Hijri date 25 Ramadan 1421 corresponds to the Gregorian date Thursday, 21 December 2000. This date lies in the ninth month of the Hijri year 1421 AH, which is Ramadan of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1421/09/25 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 21 December 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 25 Ramadan 1421 AH to its equivalent Gregorian date.
وَلَوْ نَشَآءُ لَجَعَلْنَا مِنكُم مَّلَٰٓئِكَةًۭ فِى ٱلْأَرْضِ يَخْلُفُونَ
And had We willed We could have set among you angels to be viceroys in the earth.
Surah Az-Zukhruf(43:60)