Well, the Hijri date 4 Dhul Hijjah 1421 corresponds to the Gregorian date Tuesday, 27 February 2001. This date lies in the twelfth month of the Hijri year 1421 AH, which is Dhu Al-Hijjah of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1421/12/04 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 February 2001 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Dhul Hijjah 1421 AH to its equivalent Gregorian date.
ٱلَّذِينَ يَسْتَمِعُونَ ٱلْقَوْلَ فَيَتَّبِعُونَ أَحْسَنَهُۥٓ ۚ أُو۟لَٰٓئِكَ ٱلَّذِينَ هَدَىٰهُمُ ٱللَّهُ ۖ وَأُو۟لَٰٓئِكَ هُمْ أُو۟لُوا۟ ٱلْأَلْبَٰبِ
Who hear advice and follow the best thereof. Such are those whom Allah guideth, and such are men of understanding.
Surah Az-Zumar(39:18)
Sahih al-Bukhari
Virtues of the Qur'an
Chapter: The superiority of Surat Al-Fath (No48)
Narrated Aslam:
Allah's Messenger (ﷺ) was traveling on one of his journeys, and `Umar bin Al-Khattab was traveling along with him at night. `Umar asked him about something, but Allah's Messenger (ﷺ) did not answer him. He asked again, but he did not answer. He asked for the third time, but he did not answer. On that, `Umar said to himself, "May your mother lose you! You have asked Allah's Messenger (ﷺ) three times, but he did not answer at all!" `Umar said, "So I made my camel go fast till I was ahead of the people, and I was afraid that something might be revealed about me. After a little while I heard a call maker calling me, I said, 'I was afraid that some Qur'anic Verse might be revealed about me.' So I went to Allah's Apostle and greeted him. He said, 'Tonight there has been revealed to me a Surah which is dearer to me than that on which the sun shines (i.e. the world).' Then he recited: 'Verily! We have given you (O Muhammad), a manifest victory.' " (Surat al-Fath) No. (48.1).
Sahih al-Bukhari 5012