Well, the Hijri date 15 Dhul Qidah 1405 corresponds to the Gregorian date Thursday, 1 August 1985. This date lies in the eleventh month of the Hijri year 1405 AH, which is Dhu Al-Qidah of 1405 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1405/11/15 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 1 August 1985 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Dhul Qidah 1405 AH to its equivalent Gregorian date.
وَغَدَوْا۟ عَلَىٰ حَرْدٍۢ قَٰدِرِينَ
They went betimes, strong in (this) purpose.
Surah Al-Qalam(68:25)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"...And eat and drink until the white thread (light) of dawn appears to you distinct from the black thread (darkness of the night).. ." (V.2:187)
Narrated `Adi bin Hatim:
I said, "O Allah's Messenger (ﷺ)! What is the meaning of the white thread distinct from the black thread? Are these two threads?" He said, "You are not intelligent if you watch the two threads." He then added, "No, it is the darkness of the night and the whiteness of the day.''
Sahih al-Bukhari 4510
