Well, the Hijri date 17 Safar 1478 corresponds to the Gregorian date Thursday, 9 September 2055. This date lies in the second month of the Hijri year 1478 AH, which is Safar of 1478 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1478/02/17 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 9 September 2055 to its equivalent Arabic date.
The following is the conversion of the Arabic date 17 Safar 1478 AH to its equivalent Gregorian date.
ذَٰلِكَ بِأَنَّهُۥ كَانَت تَّأْتِيهِمْ رُسُلُهُم بِٱلْبَيِّنَٰتِ فَقَالُوٓا۟ أَبَشَرٌۭ يَهْدُونَنَا فَكَفَرُوا۟ وَتَوَلَّوا۟ ۚ وَّٱسْتَغْنَى ٱللَّهُ ۚ وَٱللَّهُ غَنِىٌّ حَمِيدٌۭ
That was because their messengers (from Allah) kept coming unto them with clear proofs (of Allah's Sovereignty), but they said: Shall mere mortals guide us? So they disbelieved and turned away, and Allah was independent (of them). Allah is Absolute, Owner of Praise.
Surah At-Taghaabun(64:6)