Well, the Hijri date 13 Dhul Hijjah 1406 corresponds to the Gregorian date Monday, 18 August 1986. This date lies in the twelfth month of the Hijri year 1406 AH, which is Dhu Al-Hijjah of 1406 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1406/12/13 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 18 August 1986 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Dhul Hijjah 1406 AH to its equivalent Gregorian date.
وَقِهِمُ ٱلسَّيِّـَٔاتِ ۚ وَمَن تَقِ ٱلسَّيِّـَٔاتِ يَوْمَئِذٍۢ فَقَدْ رَحِمْتَهُۥ ۚ وَذَٰلِكَ هُوَ ٱلْفَوْزُ ٱلْعَظِيمُ
And ward off from them ill-deeds; and he from whom Thou wardest off ill-deeds that day, him verily hast Thou taken into mercy. That is the supreme triumph.
Surah Ghafir(40:9)