Well, the Hijri date 4 Muharram 1336 corresponds to the Gregorian date Saturday, 20 October 1917. This date lies in the first month of the Hijri year 1336 AH, which is Muharram of 1336 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1336/01/04 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 20 October 1917 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Muharram 1336 AH to its equivalent Gregorian date.
وَمَا مِنَّآ إِلَّا لَهُۥ مَقَامٌۭ مَّعْلُومٌۭ
There is not one of us but hath his known position.
Surah As-Saaffaat(37:164)