Well, the Hijri date 22 Muharram 1421 corresponds to the Gregorian date Thursday, 27 April 2000. This date lies in the first month of the Hijri year 1421 AH, which is Muharram of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1421/01/22 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 27 April 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 22 Muharram 1421 AH to its equivalent Gregorian date.
وَإِذْ قَالَ مُوسَىٰ لِقَوْمِهِۦ يَٰقَوْمِ إِنَّكُمْ ظَلَمْتُمْ أَنفُسَكُم بِٱتِّخَاذِكُمُ ٱلْعِجْلَ فَتُوبُوٓا۟ إِلَىٰ بَارِئِكُمْ فَٱقْتُلُوٓا۟ أَنفُسَكُمْ ذَٰلِكُمْ خَيْرٌۭ لَّكُمْ عِندَ بَارِئِكُمْ فَتَابَ عَلَيْكُمْ ۚ إِنَّهُۥ هُوَ ٱلتَّوَّابُ ٱلرَّحِيمُ
And when Moses said unto his people: O my people! Ye have wronged yourselves by your choosing of the calf (for worship) so turn in penitence to your Creator, and kill (the guilty) yourselves. That will be best for you with your Creator and He will relent toward you. Lo! He is the Relenting, the Merciful.
Surah Al-Baqara(2:54)