Well, the Hijri date 15 Rabi Al Thani 1421 corresponds to the Gregorian date Monday, 17 July 2000. This date lies in the fourth month of the Hijri year 1421 AH, which is Rabi Al-Thani of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1421/04/15 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 17 July 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Rabi Al Thani 1421 AH to its equivalent Gregorian date.
وَيْلٌۭ يَوْمَئِذٍۢ لِّلْمُكَذِّبِينَ
Woe unto the repudiators on that day!
Surah Al-Mursalaat(77:15)
Sahih al-Bukhari
Hajj (Pilgrimage)
Chapter: From where to enter Makkah
Narrated Ibn `Umar:
Allah's Messenger (ﷺ) used to enter Mecca from the high Thaniya and used to leave Mecca from the low Thaniya.
Sahih al-Bukhari 1575