Well, the Hijri date 21 Dhul Qidah 1421 corresponds to the Gregorian date Thursday, 15 February 2001. This date lies in the eleventh month of the Hijri year 1421 AH, which is Dhu Al-Qidah of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1421/11/21 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 15 February 2001 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Qidah 1421 AH to its equivalent Gregorian date.
ٱلَّذِى جَعَلَ لَكُمُ ٱلْأَرْضَ فِرَٰشًۭا وَٱلسَّمَآءَ بِنَآءًۭ وَأَنزَلَ مِنَ ٱلسَّمَآءِ مَآءًۭ فَأَخْرَجَ بِهِۦ مِنَ ٱلثَّمَرَٰتِ رِزْقًۭا لَّكُمْ ۖ فَلَا تَجْعَلُوا۟ لِلَّهِ أَندَادًۭا وَأَنتُمْ تَعْلَمُونَ
Who hath appointed the earth a resting-place for you, and the sky a canopy; and causeth water to pour down from the sky, thereby producing fruits as food for you. And do not set up rivals to Allah when ye know (better).
Surah Al-Baqara(2:22)
Sahih al-Bukhari
Oneness, Uniqueness of Allah (Tawheed)
Chapter: Asking Allah with His Names and seeking refuge with them
Narrated Ibn `Abbas:
Allah's Messenger (ﷺ) said, "If anyone of you, when intending to have a sexual relation (sleep) with his wife, says: Bismillah, Allahumma jannibna ashShaitan, wa Jannib ash-Shaitana ma razaqtana, Satan would never harm that child, should it be ordained that they will have one. (Because of that sleep).
Sahih al-Bukhari 7396