Well, the Hijri date 30 Dhul Qidah 1400 corresponds to the Gregorian date Thursday, 9 October 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 1400/11/30 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 9 October 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 30 Dhul Qidah 1400 AH to its equivalent Gregorian date.
۞ وَإِذَا مَسَّ ٱلْإِنسَٰنَ ضُرٌّۭ دَعَا رَبَّهُۥ مُنِيبًا إِلَيْهِ ثُمَّ إِذَا خَوَّلَهُۥ نِعْمَةًۭ مِّنْهُ نَسِىَ مَا كَانَ يَدْعُوٓا۟ إِلَيْهِ مِن قَبْلُ وَجَعَلَ لِلَّهِ أَندَادًۭا لِّيُضِلَّ عَن سَبِيلِهِۦ ۚ قُلْ تَمَتَّعْ بِكُفْرِكَ قَلِيلًا ۖ إِنَّكَ مِنْ أَصْحَٰبِ ٱلنَّارِ
And when some hurt toucheth man, he crieth unto his Lord, turning unto Him (repentant). Then, when He granteth him a boon from Him he forgetteth that for which he cried unto Him before, and setteth up rivals to Allah that he may beguile (men) from his way. Say (O Muhammad, unto such an one): Take pleasure in thy disbelief a while. Lo! thou art of the owners of the Fire.
Surah Az-Zumar(39:8)
Sahih al-Bukhari
Good Manners and Form (Al-Adab)
Chapter: Do not abuse Ad-Dahr
Narrated Abu Huraira:
The Prophet (ﷺ) said, "Don't call the grapes Al-Karm, and don't say 'Khaibat-ad-Dahri, for Allah is the Dahr. (See Hadith No. 202.)
Sahih al-Bukhari 6182