Well, the Hijri date 13 Muharram 1421 corresponds to the Gregorian date Tuesday, 18 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 Tuesday without any doubt. The Arabic date 1421/01/13 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 18 April 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Muharram 1421 AH to its equivalent Gregorian date.
قَالُوا۟ مَآ أَخْلَفْنَا مَوْعِدَكَ بِمَلْكِنَا وَلَٰكِنَّا حُمِّلْنَآ أَوْزَارًۭا مِّن زِينَةِ ٱلْقَوْمِ فَقَذَفْنَٰهَا فَكَذَٰلِكَ أَلْقَى ٱلسَّامِرِىُّ
They said: We broke not tryst with thee of our own will, but we were laden with burdens of ornaments of the folk, then cast them (in the fire), for thus As-Samiri proposed.
Surah Taa-Haa(20:87)
Sahih al-Bukhari
Fasting
Chapter: The two months of Eid do not decrease
Narrated Abu Bakra:
The Prophet (ﷺ) said, "The two months of `Id i.e. Ramadan and Dhul-Hijja, do not decrease (in superiority).
Sahih al-Bukhari 1912