Well, the Hijri date 18 Ramadan 1406 corresponds to the Gregorian date Monday, 26 May 1986. This date lies in the ninth month of the Hijri year 1406 AH, which is Ramadan of 1406 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1406/09/18 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 26 May 1986 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Ramadan 1406 AH to its equivalent Gregorian date.
قُل لِّلَّذِينَ كَفَرُوا۟ سَتُغْلَبُونَ وَتُحْشَرُونَ إِلَىٰ جَهَنَّمَ ۚ وَبِئْسَ ٱلْمِهَادُ
Say (O Muhammad) unto those who disbelieve: Ye shall be overcome and gathered unto Hell, an evil resting-place.
Surah Aal-i-Imraan(3:12)
Sahih al-Bukhari
Merits of the Helpers in Madinah (Ansaar)
Chapter: The emigration of the Prophet (saws) to Al-Madina
Narrated Asma:
That she conceived `Abdullah bin Az-Zubair. She added, "I migrated to Medina while I was at full term of pregnancy and alighted at Quba where I gave birth to him. Then I brought him to the Prophet (ﷺ) and put him in his lap. The Prophet (ﷺ) asked for a date, chewed it, and put some of its juice in the child's mouth. So, the first thing that entered the child's stomach was the saliva of Allah's Messenger (ﷺ). Then the Prophet rubbed the child's palate with a date and invoked for Allah's Blessings on him, and he was the first child born amongst the Emigrants in the Islamic Land (i.e. Medina).
Sahih al-Bukhari 3909