Well, the Hijri date 21 Rajab 1400 corresponds to the Gregorian date Wednesday, 4 June 1980. This date lies in the seventh month of the Hijri year 1400 AH, which is Rajab of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1400/07/21 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 4 June 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rajab 1400 AH to its equivalent Gregorian date.
وَإِذْ أَخَذْنَا مِيثَٰقَ بَنِىٓ إِسْرَٰٓءِيلَ لَا تَعْبُدُونَ إِلَّا ٱللَّهَ وَبِٱلْوَٰلِدَيْنِ إِحْسَانًۭا وَذِى ٱلْقُرْبَىٰ وَٱلْيَتَٰمَىٰ وَٱلْمَسَٰكِينِ وَقُولُوا۟ لِلنَّاسِ حُسْنًۭا وَأَقِيمُوا۟ ٱلصَّلَوٰةَ وَءَاتُوا۟ ٱلزَّكَوٰةَ ثُمَّ تَوَلَّيْتُمْ إِلَّا قَلِيلًۭا مِّنكُمْ وَأَنتُم مُّعْرِضُونَ
And (remember) when We made a covenant with the Children of Israel, (saying): Worship none save Allah (only), and be good to parents and to kindred and to orphans and the needy, and speak kindly to mankind; and establish worship and pay the poor-due. Then, after that, ye slid back, save a few of you, being averse.
Surah Al-Baqara(2:83)
Sahih al-Bukhari
Sales and Trade
Chapter: The purchase of a slave from the enemy
Narrated Sa`d that his father said:
`Abdur-Rahman bin `Auf said to Suhaib, 'Fear Allah and do not ascribe yourself to somebody other than your father.' Suhaib replied, 'I would not like to say it even if I were given large amounts of money, but I say I was kidnapped in my childhood.' "
Sahih al-Bukhari 2219