Well, the Hijri date 15 Dhul Hijjah 1400 corresponds to the Gregorian date Friday, 24 October 1980. This date lies in the twelfth month of the Hijri year 1400 AH, which is Dhu Al-Hijjah of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1400/12/15 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 24 October 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Dhul Hijjah 1400 AH to its equivalent Gregorian date.
أَفَلَمْ يَنظُرُوٓا۟ إِلَى ٱلسَّمَآءِ فَوْقَهُمْ كَيْفَ بَنَيْنَٰهَا وَزَيَّنَّٰهَا وَمَا لَهَا مِن فُرُوجٍۢ
Have they not then observed the sky above them, how We have constructed it and beautified it, and how there are no rifts therein?
Surah Qaaf(50:6)
Sahih al-Bukhari
Holding Fast to the Qur'an and Sunnah
Chapter: Comparing an ambiguous situation to a clear well-defined one
Narrated Ibn `Abbas:
A woman came to the Prophet (ﷺ) and said, "My mother vowed to perform the Hajj but she died before performing it. Should I perform the Hajj on her behalf?" He said, "Yes! Perform the Hajj on her behalf. See, if your mother had been in debt, would you have paid her debt?" She said, "Yes." He said, "So you should pay what is for Him as Allah has more right that one should fulfill one's obligations to Him. "
Sahih al-Bukhari 7315
