Well, the Hijri date 26 Dhul Hijjah 1406 corresponds to the Gregorian date Sunday, 31 August 1986. This date lies in the twelfth month of the Hijri year 1406 AH, which is Dhu Al-Hijjah of 1406 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1406/12/26 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 31 August 1986 to its equivalent Arabic date.
The following is the conversion of the Arabic date 26 Dhul Hijjah 1406 AH to its equivalent Gregorian date.
وَمِنْهُم مَّن يَقُولُ ٱئْذَن لِّى وَلَا تَفْتِنِّىٓ ۚ أَلَا فِى ٱلْفِتْنَةِ سَقَطُوا۟ ۗ وَإِنَّ جَهَنَّمَ لَمُحِيطَةٌۢ بِٱلْكَٰفِرِينَ
Of them is he who saith: Grant me leave (to stay at home) and tempt me not. Surely it is into temptation that they (thus) have fallen. Lo! hell verily is all around the disbelievers.
Surah At-Tawba(9:49)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: Ghazwa of Khaibar
Narrated Anas bin Malik:
We reached Khaibar early in the morning and the inhabitants of Khaibar came out carrying their spades, and when they saw the Prophet (ﷺ) they said, "Muhammad! By Allah! Muhammad and his army!" The Prophet (ﷺ) said, "Allahu-Akbar! Khaibar is destroyed, for whenever we approach a (hostile) nation (to fight) then evil will be the morning for those who have been warned." We then got the meat of donkeys (and intended to eat it), but an announcement was made by the announcer of the Prophet, "Allah and His Apostle forbid you to eat the meat of donkeys as it is an impure thing."
Sahih al-Bukhari 4198