Well, the Hijri date 20 Dhul Hijjah 1404 corresponds to the Gregorian date Saturday, 15 September 1984. This date lies in the twelfth month of the Hijri year 1404 AH, which is Dhu Al-Hijjah of 1404 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1404/12/20 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 15 September 1984 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Dhul Hijjah 1404 AH to its equivalent Gregorian date.
وَءَاتُوا۟ ٱلنِّسَآءَ صَدُقَٰتِهِنَّ نِحْلَةًۭ ۚ فَإِن طِبْنَ لَكُمْ عَن شَىْءٍۢ مِّنْهُ نَفْسًۭا فَكُلُوهُ هَنِيٓـًۭٔا مَّرِيٓـًۭٔا
And give unto the women (whom ye marry) free gift of their marriage portions; but if they of their own accord remit unto you a part thereof, then ye are welcome to absorb it (in your wealth).
Surah An-Nisaa(4:4)
Sahih al-Bukhari
Good Manners and Form (Al-Adab)
Chapter: Whoever calls his brother a Kafir without any grounds
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "If a man says to his brother, O Kafir (disbeliever)!' Then surely one of them is such (i.e., a Kafir). "
Sahih al-Bukhari 6103