Well, the Hijri date 10 Rajab 1405 corresponds to the Gregorian date Sunday, 31 March 1985. This date lies in the seventh month of the Hijri year 1405 AH, which is Rajab of 1405 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1405/07/10 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 31 March 1985 to its equivalent Arabic date.
The following is the conversion of the Arabic date 10 Rajab 1405 AH to its equivalent Gregorian date.
قُلْ إِنَّمَا يُوحَىٰٓ إِلَىَّ أَنَّمَآ إِلَٰهُكُمْ إِلَٰهٌۭ وَٰحِدٌۭ ۖ فَهَلْ أَنتُم مُّسْلِمُونَ
Say: It is only inspired in me that your Allah is One Allah. Will ye then surrender (unto Him)?
Surah Al-Anbiyaa(21:108)
Sahih al-Bukhari
Virtues and Merits of the Prophet (pbuh) and his Companions
Chapter: The mention of the tribes of Aslam, Ghifar, Muzaina, Juhaina, and Ashja'
Narrated Abu Bakra:
Al-Aqra' bin Habis said to the Prophet (ﷺ) "Nobody gave you the pledge of allegiance but the robbers of the pilgrims (i.e. those who used to rob the pilgrims) from the tribes of Aslam, Ghifar, Muzaina." (Ibn Abi Ya'qub is in doubt whether Al-Aqra' added. 'And Juhaina.') The Prophet (ﷺ) said, "Don't you think that the tribes of Aslam, Ghifar, Muzaina (and also perhaps) Juhaina are better than the tribes of Bani Tamim, Bani Amir, Asad, and Ghatafan?" Somebody said, "They were unsuccessful and losers!" The Prophet said, "Yes, by Him in Whose Hands my life is, they (i.e. the former) are better than they (i.e. the latter).
Sahih al-Bukhari 3516