Well, the Hijri date 18 Safar 1237 corresponds to the Gregorian date Tuesday, 13 November 1821. This date lies in the second month of the Hijri year 1237 AH, which is Safar of 1237 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1237/02/18 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 13 November 1821 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Safar 1237 AH to its equivalent Gregorian date.
وَلَأُضِلَّنَّهُمْ وَلَأُمَنِّيَنَّهُمْ وَلَءَامُرَنَّهُمْ فَلَيُبَتِّكُنَّ ءَاذَانَ ٱلْأَنْعَٰمِ وَلَءَامُرَنَّهُمْ فَلَيُغَيِّرُنَّ خَلْقَ ٱللَّهِ ۚ وَمَن يَتَّخِذِ ٱلشَّيْطَٰنَ وَلِيًّۭا مِّن دُونِ ٱللَّهِ فَقَدْ خَسِرَ خُسْرَانًۭا مُّبِينًۭا
And surely I will lead them astray, and surely I will arouse desires in them, and surely I will command them and they will cut the cattle' ears, and surely I will command them and they will change Allah's creation. Whoso chooseth Satan for a patron instead of Allah is verily a loser and his loss is manifest.
Surah An-Nisaa(4:119)