Well, the Hijri date 21 Rabi Al Awwal 1407 corresponds to the Gregorian date Sunday, 23 November 1986. This date lies in the third month of the Hijri year 1407 AH, which is Rabi Al-Awwal of 1407 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1407/03/21 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 23 November 1986 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Awwal 1407 AH to its equivalent Gregorian date.
وَفِى ٱلْأَرْضِ ءَايَٰتٌۭ لِّلْمُوقِنِينَ
And in the earth are portents for those whose faith is sure.
Surah Adh-Dhaariyat(51:20)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: The delegation of ‘Abdul-Qais
Narrated Abu Jamra:
I said to Ibn `Abbas, "I have an earthenware pot containing Nabidh (i.e. water and dates or grapes) for me, and I drink of it while it is sweet. If I drink much of it and stay with the people for a long time, I get afraid that they may discover it (for I will appear as if I were drunk). Ibn `Abbas said, "A delegation of `Abdul Qais came to Allah's Messenger (ﷺ) and he said, "Welcome, O people! Neither will you have disgrace nor will you regret." They said, "O Allah's Messenger (ﷺ)! There are the Mudar pagans between you and us, so we cannot come to you except in the sacred Months. So please teach us some orders on acting upon which we will enter Paradise. Besides, we will preach that to our people who are behind us." The Prophet (ﷺ) said, "I order you to do four things and forbid you from four things (I order you): To believe in Allah...Do you know what is to believe in Allah? That is to testify that None has the right to be worshipped except Allah: (I order you also to offer prayers perfectly to pay Zakat; and to fast the month of Ramadan and to give the Khumus (i.e. one-fifth of the booty) (for Allah's Sake). I forbid you from four other things (i.e. the wine that is prepared in) Ad-Dubba, An-Naquir, Az-Hantam and Al-Muzaffat. (See Hadith No. 50 Vol. 1)
Sahih al-Bukhari 4368