Well, the Hijri date 19 Dhul Qidah 1240 corresponds to the Gregorian date Monday, 4 July 1825. This date lies in the eleventh month of the Hijri year 1240 AH, which is Dhu Al-Qidah of 1240 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1240/11/19 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 4 July 1825 to its equivalent Arabic date.
The following is the conversion of the Arabic date 19 Dhul Qidah 1240 AH to its equivalent Gregorian date.
وَمِنْ ءَايَٰتِهِ ٱلَّيْلُ وَٱلنَّهَارُ وَٱلشَّمْسُ وَٱلْقَمَرُ ۚ لَا تَسْجُدُوا۟ لِلشَّمْسِ وَلَا لِلْقَمَرِ وَٱسْجُدُوا۟ لِلَّهِ ٱلَّذِى خَلَقَهُنَّ إِن كُنتُمْ إِيَّاهُ تَعْبُدُونَ
And of His portents are the night and the day and the sun and the moon. Do not prostrate to the sun or the moon; but prostrate to Allah Who created them, if it is in truth Him Whom ye worship.
Surah Fussilat(41:37)