Well, the Hijri date 9 Muharram 1390 corresponds to the Gregorian date Monday, 16 March 1970. This date lies in the first month of the Hijri year 1390 AH, which is Muharram of 1390 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1390/01/09 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 16 March 1970 to its equivalent Arabic date.
The following is the conversion of the Arabic date 9 Muharram 1390 AH to its equivalent Gregorian date.
لَّقَدْ كَفَرَ ٱلَّذِينَ قَالُوٓا۟ إِنَّ ٱللَّهَ ثَالِثُ ثَلَٰثَةٍۢ ۘ وَمَا مِنْ إِلَٰهٍ إِلَّآ إِلَٰهٌۭ وَٰحِدٌۭ ۚ وَإِن لَّمْ يَنتَهُوا۟ عَمَّا يَقُولُونَ لَيَمَسَّنَّ ٱلَّذِينَ كَفَرُوا۟ مِنْهُمْ عَذَابٌ أَلِيمٌ
They surely disbelieve who say: Lo! Allah is the third of three; when there is no Allah save the One Allah. If they desist not from so saying a painful doom will fall on those of them who disbelieve.
Surah Al-Maaida(5:73)
Sahih al-Bukhari
Prayers (Salat)
Chapter: The religious gathering in circles and sitting in the mosque
Narrated Ibn `Umar:
A man came to the Prophet (ﷺ) while he was delivering the sermon and asked him how to offer the night prayers. The Prophet (ﷺ) replied, 'Pray two rak`at at a time and then two and then two and so on and if you are afraid of dawn (the approach of the time of the Fajr prayer) pray one rak`a and that will be the witr for all the rak`at which you have prayed." Narrated 'Ubaidullah bin `Abdullah bin `Umar: A man called the Prophet (ﷺ) while he was in the mosque.
Sahih al-Bukhari 473