Well, the Hijri date 21 Dhul Qidah 1406 corresponds to the Gregorian date Monday, 28 July 1986. This date lies in the eleventh month of the Hijri year 1406 AH, which is Dhu Al-Qidah of 1406 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1406/11/21 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 28 July 1986 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Dhul Qidah 1406 AH to its equivalent Gregorian date.
أَمْ لَهُمْ ءَالِهَةٌۭ تَمْنَعُهُم مِّن دُونِنَا ۚ لَا يَسْتَطِيعُونَ نَصْرَ أَنفُسِهِمْ وَلَا هُم مِّنَّا يُصْحَبُونَ
Or have they gods who can shield them from Us? They cannot help themselves nor can they be defended from Us.
Surah Al-Anbiyaa(21:43)
Sahih al-Bukhari
Friday Prayer
Chapter: The prescription of Jumu'ah prayer and Khutba
Narrated Abu Huraira:
I heard Allah's Messenger (ﷺ) (p.b.u.h) saying, "We (Muslims) are the last (to come) but (will be) the foremost on the Day of Resurrection though the former nations were given the Holy Scriptures before us. And this was their day (Friday) the celebration of which was made compulsory for them but they differed about it. So Allah gave us the guidance for it (Friday) and all the other people are behind us in this respect: the Jews' (holy day is) tomorrow (i.e. Saturday) and the Christians' (is) the day after tomorrow (i.e. Sunday)."
Sahih al-Bukhari 876