Well, the Hijri date 20 Dhul Qidah 1399 corresponds to the Gregorian date Thursday, 11 October 1979. This date lies in the eleventh month of the Hijri year 1399 AH, which is Dhu Al-Qidah of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1399/11/20 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 11 October 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Dhul Qidah 1399 AH to its equivalent Gregorian date.
وَمَا لَكُمْ أَلَّا تُنفِقُوا۟ فِى سَبِيلِ ٱللَّهِ وَلِلَّهِ مِيرَٰثُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ ۚ لَا يَسْتَوِى مِنكُم مَّنْ أَنفَقَ مِن قَبْلِ ٱلْفَتْحِ وَقَٰتَلَ ۚ أُو۟لَٰٓئِكَ أَعْظَمُ دَرَجَةًۭ مِّنَ ٱلَّذِينَ أَنفَقُوا۟ مِنۢ بَعْدُ وَقَٰتَلُوا۟ ۚ وَكُلًّۭا وَعَدَ ٱللَّهُ ٱلْحُسْنَىٰ ۚ وَٱللَّهُ بِمَا تَعْمَلُونَ خَبِيرٌۭ
And what aileth you that ye spend not in the way of Allah when unto Allah belongeth the inheritance of the heavens and the earth? Those who spent and fought before the victory are not upon a level (with the rest of you). Such are greater in rank than those who spent and fought afterwards. Unto each hath Allah promised good. And Allah is Informed of what ye do.
Surah Al-Hadid(57:10)
Sahih al-Bukhari
Oppressions
Chapter: The person who behaves impudently
Narrated `Abdullah bin `Amr:
The Prophet (ﷺ) said, "Whoever has (the following) four characters will be a hypocrite, and whoever has one of the following four characteristics will have one characteristic of hypocrisy until he gives it up. These are: (1 ) Whenever he talks, he tells a lie; (2) whenever he makes a promise, he breaks it; (3) whenever he makes a covenant he proves treacherous; (4) and whenever he quarrels, he behaves impudently in an evil insulting manner." (See Hadith No. 33 Vol. 1)
Sahih al-Bukhari 2459