Well, the Hijri date 21 Rabi Al Awwal 1390 corresponds to the Gregorian date Tuesday, 26 May 1970. This date lies in the third month of the Hijri year 1390 AH, which is Rabi Al-Awwal of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1390/03/21 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 26 May 1970 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Awwal 1390 AH to its equivalent Gregorian date.
وَأَنَّهُۥ هُوَ رَبُّ ٱلشِّعْرَىٰ
And that He it is Who is the Lord of Sirius;
Surah An-Najm(53:49)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"Say (0 Muslims), We believe in Allah and that which has been sent down to us..." (V.2:136)
Narrated Abu Huraira:
The people of the Scripture (Jews) used to recite the Torah in Hebrew and they used to explain it in Arabic to the Muslims. On that Allah's Messenger (ﷺ) said, "Do not believe the people of the Scripture or disbelieve them, but say:-- "We believe in Allah and what is revealed to us." (2.136)
Sahih al-Bukhari 4485
