Well, the Hijri date 27 Rajab 1400 corresponds to the Gregorian date Tuesday, 10 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 Tuesday without any doubt. The Arabic date 1400/07/27 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 10 June 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Rajab 1400 AH to its equivalent Gregorian date.
يَٰبَنِىٓ إِسْرَٰٓءِيلَ ٱذْكُرُوا۟ نِعْمَتِىَ ٱلَّتِىٓ أَنْعَمْتُ عَلَيْكُمْ وَأَنِّى فَضَّلْتُكُمْ عَلَى ٱلْعَٰلَمِينَ
O Children of Israel! Remember My favour wherewith I favoured you and how I preferred you to (all) creatures.
Surah Al-Baqara(2:122)
Sahih al-Bukhari
Judgments (Ahkaam)
Chapter: Can a judge give a judgement in an angry mood?
Narrated Abu Mas`ud Al-Ansari:
A man came to Allah's Messenger (ﷺ) and said, "O Allah's Messenger (ﷺ)! By Allah, I fail to attend the morning congregational prayer because so-and-so (i.e., Mu`adh bin Jabal) prolongs the prayer when he leads us for it." I had never seen the Prophet (ﷺ) more furious in giving advice than he was on that day. He then said, "O people! some of you make others dislike (good deeds, i.e. prayers etc). So whoever among you leads the people in prayer, he should shorten it because among them there are the old, the weak and the busy (needy having some jobs to do). (See Hadith No. 90, Vol. 1)
Sahih al-Bukhari 7159