Well, the Hijri date 8 Rajab 1400 corresponds to the Gregorian date Thursday, 22 May 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 Thursday without any doubt. The Arabic date 1400/07/08 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 22 May 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 8 Rajab 1400 AH to its equivalent Gregorian date.
فَمَا كَانَ جَوَابَ قَوْمِهِۦٓ إِلَّآ أَن قَالُوا۟ ٱقْتُلُوهُ أَوْ حَرِّقُوهُ فَأَنجَىٰهُ ٱللَّهُ مِنَ ٱلنَّارِ ۚ إِنَّ فِى ذَٰلِكَ لَءَايَٰتٍۢ لِّقَوْمٍۢ يُؤْمِنُونَ
But the answer of his folk was only that they said: "Kill him" or "Burn him." Then Allah saved him from the Fire. Lo! herein verily are portents for folk who believe.
Surah Al-Ankaboot(29:24)
Sahih al-Bukhari
Fighting for the Cause of Allah (Jihaad)
Chapter: Speaking with an unfamiliar accent
Narrated Abu Huraira:
Al-Hasan bin 'All took a date from the dates of the Sadaqa and put it in his mouth. The Prophet (ﷺ) said (to him) in Persian, "Kakh, kakh! (i.e. Don't you know that we do not eat the Sadaqa (i.e. what is given in charity) (charity is the dirt of the people)).
Sahih al-Bukhari 3072