Well, the Hijri date 1 Dhul Hijjah 1401 corresponds to the Gregorian date Tuesday, 29 September 1981. This date lies in the twelfth month of the Hijri year 1401 AH, which is Dhu Al-Hijjah of 1401 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1401/12/01 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 29 September 1981 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Dhul Hijjah 1401 AH to its equivalent Gregorian date.
وَقَالَ لِلَّذِى ظَنَّ أَنَّهُۥ نَاجٍۢ مِّنْهُمَا ٱذْكُرْنِى عِندَ رَبِّكَ فَأَنسَىٰهُ ٱلشَّيْطَٰنُ ذِكْرَ رَبِّهِۦ فَلَبِثَ فِى ٱلسِّجْنِ بِضْعَ سِنِينَ
And he said unto him of the twain who he knew would be released: Mention me in the presence of thy lord. But Satan caused him to forget to mention it to his lord, so he (Joseph) stayed in prison for some years.
Surah Yusuf(12:42)