Well, the Hijri date 15 Dhul Qidah 1420 corresponds to the Gregorian date Monday, 21 February 2000. This date lies in the eleventh month of the Hijri year 1420 AH, which is Dhu Al-Qidah of 1420 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1420/11/15 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 21 February 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Dhul Qidah 1420 AH to its equivalent Gregorian date.
تِلْكَ حُدُودُ ٱللَّهِ ۚ وَمَن يُطِعِ ٱللَّهَ وَرَسُولَهُۥ يُدْخِلْهُ جَنَّٰتٍۢ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ خَٰلِدِينَ فِيهَا ۚ وَذَٰلِكَ ٱلْفَوْزُ ٱلْعَظِيمُ
These are the limits (imposed by) Allah. Whoso obeyeth Allah and His messenger, He will make him enter Gardens underneath which rivers flow, where such will dwell for ever. That will be the great success.
Surah An-Nisaa(4:13)