Well, the Hijri date 27 Rabi Al Thani 1400 corresponds to the Gregorian date Friday, 14 March 1980. This date lies in the fourth month of the Hijri year 1400 AH, which is Rabi Al-Thani of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1400/04/27 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 14 March 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Rabi Al Thani 1400 AH to its equivalent Gregorian date.
وَقَالُوا۟ لَن يَدْخُلَ ٱلْجَنَّةَ إِلَّا مَن كَانَ هُودًا أَوْ نَصَٰرَىٰ ۗ تِلْكَ أَمَانِيُّهُمْ ۗ قُلْ هَاتُوا۟ بُرْهَٰنَكُمْ إِن كُنتُمْ صَٰدِقِينَ
And they say: None entereth paradise unless he be a Jew or a Christian. These are their own desires. Say: Bring your proof (of what ye state) if ye are truthful.
Surah Al-Baqara(2:111)
Sahih al-Bukhari
Knowledge
Chapter: Whoever gave a religious verdict by beckoning or by nodding
Narrated Abu Huraira:
The Prophet (ﷺ) said, "(Religious) knowledge will be taken away (by the death of religious scholars) ignorance (in religion) and afflictions will appear; and Harj will increase." It was asked, "What is Harj, O Allah's Messenger (ﷺ)?" He replied by beckoning with his hand indicating "killing." (Fath-al-Bari Page 192, Vol. 1)
Sahih al-Bukhari 85