Well, the Hijri date 29 Muharram 1255 corresponds to the Gregorian date Saturday, 13 April 1839. This date lies in the first month of the Hijri year 1255 AH, which is Muharram of 1255 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1255/01/29 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 13 April 1839 to its equivalent Arabic date.
The following is the conversion of the Arabic date 29 Muharram 1255 AH to its equivalent Gregorian date.
أَنَّىٰ لَهُمُ ٱلذِّكْرَىٰ وَقَدْ جَآءَهُمْ رَسُولٌۭ مُّبِينٌۭ
How can there be remembrance for them, when a messenger making plain (the Truth) had already come unto them,
Surah Ad-Dukhaan(44:13)