Well, the Hijri date 11 Dhul Hijjah 1259 corresponds to the Gregorian date Monday, 1 January 1844. This date lies in the twelfth month of the Hijri year 1259 AH, which is Dhu Al-Hijjah of 1259 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1259/12/11 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 1 January 1844 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Dhul Hijjah 1259 AH to its equivalent Gregorian date.
۞ لَيْسُوا۟ سَوَآءًۭ ۗ مِّنْ أَهْلِ ٱلْكِتَٰبِ أُمَّةٌۭ قَآئِمَةٌۭ يَتْلُونَ ءَايَٰتِ ٱللَّهِ ءَانَآءَ ٱلَّيْلِ وَهُمْ يَسْجُدُونَ
They are not all alike. Of the People of the Scripture there is a staunch community who recite the revelations of Allah in the night season, falling prostrate (before Him).
Surah Aal-i-Imraan(3:113)