Well, the Hijri date 7 Muharram 1409 corresponds to the Gregorian date Friday, 19 August 1988. This date lies in the first month of the Hijri year 1409 AH, which is Muharram of 1409 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1409/01/07 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 August 1988 to its equivalent Arabic date.
The following is the conversion of the Arabic date 7 Muharram 1409 AH to its equivalent Gregorian date.
وَلَقَدْ ءَاتَيْنَا مُوسَى ٱلْكِتَٰبَ فَلَا تَكُن فِى مِرْيَةٍۢ مِّن لِّقَآئِهِۦ ۖ وَجَعَلْنَٰهُ هُدًۭى لِّبَنِىٓ إِسْرَٰٓءِيلَ
We verily gave Moses the Scripture; so be not ye in doubt of his receiving it; and We appointed it a guidance for the Children of Israel.
Surah As-Sajda(32:23)