Well, the Hijri date 17 Rabi Al Awwal 1440 corresponds to the Gregorian date Sunday, 25 November 2018. This date lies in the third month of the Hijri year 1440 AH, which is Rabi Al-Awwal of 1440 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1440/03/17 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 25 November 2018 to its equivalent Arabic date.
The following is the conversion of the Arabic date 17 Rabi Al Awwal 1440 AH to its equivalent Gregorian date.
وَمَا يَتَّبِعُ أَكْثَرُهُمْ إِلَّا ظَنًّا ۚ إِنَّ ٱلظَّنَّ لَا يُغْنِى مِنَ ٱلْحَقِّ شَيْـًٔا ۚ إِنَّ ٱللَّهَ عَلِيمٌۢ بِمَا يَفْعَلُونَ
Most of them follow not but conjecture. Assuredly conjecture can by no means take the place of truth. Lo! Allah is Aware of what they do.
Surah Yunus(10:36)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
The Statement of Allah the Exalted: "...And to Dāwūd (David) We gave the Zabūr (Psalms) ." (V.17:55)
Narrated Abu Huraira:
The Prophet (ﷺ) said, "The recitation of Psalms (David's Qur'an) was made light and easy for David that he used to have his ridding animal be saddled while he would finish the recitation before the servant had saddled it."
Sahih al-Bukhari 4713