Well, the Hijri date 18 Rabi Al Thani 1381 corresponds to the Gregorian date Thursday, 28 September 1961. This date lies in the fourth month of the Hijri year 1381 AH, which is Rabi Al-Thani of 1381 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1381/04/18 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 28 September 1961 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rabi Al Thani 1381 AH to its equivalent Gregorian date.
وَمِمَّنْ حَوْلَكُم مِّنَ ٱلْأَعْرَابِ مُنَٰفِقُونَ ۖ وَمِنْ أَهْلِ ٱلْمَدِينَةِ ۖ مَرَدُوا۟ عَلَى ٱلنِّفَاقِ لَا تَعْلَمُهُمْ ۖ نَحْنُ نَعْلَمُهُمْ ۚ سَنُعَذِّبُهُم مَّرَّتَيْنِ ثُمَّ يُرَدُّونَ إِلَىٰ عَذَابٍ عَظِيمٍۢ
And among those around you of the wandering Arabs there are hypocrites, and among the townspeople of Al-Madinah (there are some who) persist in hypocrisy whom thou (O Muhammad) knowest not. We, We know them, and We shall chastise them twice; then they will be relegated to a painful doom.
Surah At-Tawba(9:101)