Well, the Hijri date 5 Muharram 1406 corresponds to the Gregorian date Thursday, 19 September 1985. This date lies in the first month of the Hijri year 1406 AH, which is Muharram of 1406 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1406/01/05 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 19 September 1985 to its equivalent Arabic date.
The following is the conversion of the Arabic date 5 Muharram 1406 AH to its equivalent Gregorian date.
قَالُوا۟ مَآ أَخْلَفْنَا مَوْعِدَكَ بِمَلْكِنَا وَلَٰكِنَّا حُمِّلْنَآ أَوْزَارًۭا مِّن زِينَةِ ٱلْقَوْمِ فَقَذَفْنَٰهَا فَكَذَٰلِكَ أَلْقَى ٱلسَّامِرِىُّ
They said: We broke not tryst with thee of our own will, but we were laden with burdens of ornaments of the folk, then cast them (in the fire), for thus As-Samiri proposed.
Surah Taa-Haa(20:87)