Well, the Hijri date 21 Shaban 1488 corresponds to the Gregorian date Friday, 20 November 2065. This date lies in the eighth month of the Hijri year 1488 AH, which is Shaban of 1488 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1488/08/21 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 20 November 2065 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shaban 1488 AH to its equivalent Gregorian date.
قَالَ أَرَءَيْتَ إِذْ أَوَيْنَآ إِلَى ٱلصَّخْرَةِ فَإِنِّى نَسِيتُ ٱلْحُوتَ وَمَآ أَنسَىٰنِيهُ إِلَّا ٱلشَّيْطَٰنُ أَنْ أَذْكُرَهُۥ ۚ وَٱتَّخَذَ سَبِيلَهُۥ فِى ٱلْبَحْرِ عَجَبًۭا
He said: Didst thou see, when we took refuge on the rock, and I forgot the fish - and none but Satan caused me to forget to mention it - it took its way into the waters by a marvel.
Surah Al-Kahf(18:63)
Sahih al-Bukhari
Merits of the Helpers in Madinah (Ansaar)
Chapter: Al-Qasama in the Pre-Islamic Period of Ignorance
Narrated 'Aisha:
Allah caused the day of Buath to take place before Allah's Messenger (ﷺ) was sent (as an Apostle) so that when Allah's Messenger (ﷺ) reached Medina, those people had already divided (in different groups) and their chiefs had been killed or wounded. So Allah made that day precede Allah's Messenger (ﷺ) so that they (i.e. the Ansar) might embrace Islam.
Sahih al-Bukhari 3846