Well, the Hijri date 9 Dhul Hijjah 1400 corresponds to the Gregorian date Saturday, 18 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 Saturday without any doubt. The Arabic date 1400/12/09 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 October 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Dhul Hijjah 1400 AH to its equivalent Gregorian date.
وَأُتْبِعُوا۟ فِى هَٰذِهِۦ لَعْنَةًۭ وَيَوْمَ ٱلْقِيَٰمَةِ ۚ بِئْسَ ٱلرِّفْدُ ٱلْمَرْفُودُ
A curse is made to follow them in the world and on the Day of Resurrection. Hapless is the gift (that will be) given (them).
Surah Hud(11:99)
Sahih al-Bukhari
Divorce
Chapter: Commanding those who are involved in a case of Li'an to take the oath.
Narrated `Abdullah:
An Ansari man accused his wife (of committing illegal sexual intercourse). The Prophet (ﷺ) made both of them takes the oath of Lian, and separated them from each other (by divorce).
Sahih al-Bukhari 5306