Well, the Hijri date 1 Rabi Al Thani 1336 corresponds to the Gregorian date Sunday, 13 January 1918. This date lies in the fourth month of the Hijri year 1336 AH, which is Rabi Al-Thani of 1336 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1336/04/01 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 13 January 1918 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Rabi Al Thani 1336 AH to its equivalent Gregorian date.
وَأَقِيمُوا۟ ٱلصَّلَوٰةَ وَءَاتُوا۟ ٱلزَّكَوٰةَ ۚ وَمَا تُقَدِّمُوا۟ لِأَنفُسِكُم مِّنْ خَيْرٍۢ تَجِدُوهُ عِندَ ٱللَّهِ ۗ إِنَّ ٱللَّهَ بِمَا تَعْمَلُونَ بَصِيرٌۭ
Establish worship, and pay the poor-due; and whatever of good ye send before (you) for your souls, ye will find it with Allah. Lo! Allah is Seer of what ye do.
Surah Al-Baqara(2:110)