Well, the Hijri date 9 Dhul Qidah 1400 corresponds to the Gregorian date Thursday, 18 September 1980. This date lies in the eleventh month of the Hijri year 1400 AH, which is Dhu Al-Qidah of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1400/11/09 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 September 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Dhul Qidah 1400 AH to its equivalent Gregorian date.
وَقَالُوا۟ لِجُلُودِهِمْ لِمَ شَهِدتُّمْ عَلَيْنَا ۖ قَالُوٓا۟ أَنطَقَنَا ٱللَّهُ ٱلَّذِىٓ أَنطَقَ كُلَّ شَىْءٍۢ وَهُوَ خَلَقَكُمْ أَوَّلَ مَرَّةٍۢ وَإِلَيْهِ تُرْجَعُونَ
And they say unto their skins: Why testify ye against us? They say: Allah hath given us speech Who giveth speech to all things, and Who created you at the first, and unto Whom ye are returned.
Surah Fussilat(41:21)
Sahih al-Bukhari
Holding Fast to the Qur'an and Sunnah
Chapter: “Do not ask the people of the Scripture about anything.”
Narrated Ubaidullah:
Ibn `Abbas said, "Why do you ask the people of the scripture about anything while your Book (Qur'an) which has been revealed to Allah's Messenger (ﷺ) is newer and the latest? You read it pure, undistorted and unchanged, and Allah has told you that the people of the scripture (Jews and Christians) changed their scripture and distorted it, and wrote the scripture with their own hands and said, 'It is from Allah,' to sell it for a little gain. Does not the knowledge which has come to you prevent you from asking them about anything? No, by Allah, we have never seen any man from them asking you regarding what has been revealed to you!"
Sahih al-Bukhari 7363