Well, the Hijri date 23 Ramadan 1440 corresponds to the Gregorian date Tuesday, 28 May 2019. This date lies in the ninth month of the Hijri year 1440 AH, which is Ramadan of 1440 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1440/09/23 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 May 2019 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Ramadan 1440 AH to its equivalent Gregorian date.
قَالَ ٱلَّذِينَ ٱسْتَكْبَرُوٓا۟ إِنَّا بِٱلَّذِىٓ ءَامَنتُم بِهِۦ كَٰفِرُونَ
Those who were scornful said: Lo! in that which ye believe we are disbelievers.
Surah Al-A'raaf(7:76)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
The Statement of Allah the Most High: "...When they gave their Bai'a (pledge) to you (O Muḥammad pbuh) under the tree..." (V.48:18)
Narrated Thabit bin Ad-Dahhak:
who was one of the companions of the tree (those who swore allegiance to the Prophet (ﷺ) beneath the tree at Al-Hudaibiya):
Sahih al-Bukhari 4843