Well, the Hijri date 21 Rabi Al Thani 1442 corresponds to the Gregorian date Sunday, 6 December 2020. This date lies in the fourth month of the Hijri year 1442 AH, which is Rabi Al-Thani of 1442 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1442/04/21 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 6 December 2020 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rabi Al Thani 1442 AH to its equivalent Gregorian date.
وَيَسْتَعْجِلُونَكَ بِٱلسَّيِّئَةِ قَبْلَ ٱلْحَسَنَةِ وَقَدْ خَلَتْ مِن قَبْلِهِمُ ٱلْمَثُلَٰتُ ۗ وَإِنَّ رَبَّكَ لَذُو مَغْفِرَةٍۢ لِّلنَّاسِ عَلَىٰ ظُلْمِهِمْ ۖ وَإِنَّ رَبَّكَ لَشَدِيدُ ٱلْعِقَابِ
And they bid thee hasten on the evil rather than the good, when exemplary punishments have indeed occurred before them. But lo! thy Lord is rich in pardon for mankind despite their wrong, and lo! thy Lord is strong in punishment.
Surah Ar-Ra'd(13:6)
Sahih al-Bukhari
Invocations
Chapter: To invoke Allah at a time of distress
Narrated Ibn `Abbas:
Allah's Messenger (ﷺ) used to say at a time of distress, "La ilaha illal-lahu Rabbul-l-'arsh il-'azim, La ilaha illallahu Rabbu-s-samawati wa Rabbu-l-ard, Rabbu-l-'arsh-il-Karim."
Sahih al-Bukhari 6346