Well, the Hijri date 22 Dhul Hijjah 1399 corresponds to the Gregorian date Monday, 12 November 1979. This date lies in the twelfth month of the Hijri year 1399 AH, which is Dhu Al-Hijjah of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1399/12/22 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 12 November 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 22 Dhul Hijjah 1399 AH to its equivalent Gregorian date.
Surah (:)
Sahih al-Bukhari
Fasting
Chapter: Fasting is obligatory in (the month of) Ramadan
Narrated Ibn `Umar:
The Prophet (ﷺ) observed the fast on the 10th of Muharram ('Ashura), and ordered (Muslims) to fast on that day, but when the fasting of the month of Ramadan was prescribed, the fasting of the 'Ashura' was abandoned. `Abdullah did not use to fast on that day unless it coincided with his routine fasting by chance.
Sahih al-Bukhari 1892