Well, the Hijri date 1 Rabi Al Thani 1478 corresponds to the Gregorian date Thursday, 21 October 2055. This date lies in the fourth month of the Hijri year 1478 AH, which is Rabi Al-Thani of 1478 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1478/04/01 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 21 October 2055 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Rabi Al Thani 1478 AH to its equivalent Gregorian date.
وَإِذْ قَالَ رَبُّكَ لِلْمَلَٰٓئِكَةِ إِنِّى جَاعِلٌۭ فِى ٱلْأَرْضِ خَلِيفَةًۭ ۖ قَالُوٓا۟ أَتَجْعَلُ فِيهَا مَن يُفْسِدُ فِيهَا وَيَسْفِكُ ٱلدِّمَآءَ وَنَحْنُ نُسَبِّحُ بِحَمْدِكَ وَنُقَدِّسُ لَكَ ۖ قَالَ إِنِّىٓ أَعْلَمُ مَا لَا تَعْلَمُونَ
And when thy Lord said unto the angels: Lo! I am about to place a viceroy in the earth, they said: Wilt thou place therein one who will do harm therein and will shed blood, while we, we hymn Thy praise and sanctify Thee? He said: Surely I know that which ye know not.
Surah Al-Baqara(2:30)
Sahih al-Bukhari
Holding Fast to the Qur'an and Sunnah
Chapter: The religious learned men should not differ
Narrated Jabir bin 'Abdullah As-Salami:
A bedouin gave the Pledge of allegiance for embracing Islam to Allah's Messenger (ﷺ), and then he got an attack of fever in Medina and came to Allah's Messenger (ﷺ): and said, "O Allah's Messenger (ﷺ)! Cancel my pledge." Allah's Messenger (ﷺ) refused to do so. The bedouin came to him again and said, "Cancel my pledge," but he refused again, and then again, the bedouin came to him and said, "Cancel my pledge," and Allah's Messenger (ﷺ) refused. The bedouin finally went away, and Allah's Messenger (ﷺ) said, "Medina is like a pair of bellows (furnace), it expels its impurities while it brightens and clears its good.'
Sahih al-Bukhari 7322