Well, the Hijri date 30 Dhul Hijjah 1391 corresponds to the Gregorian date Tuesday, 15 February 1972. This date lies in the twelfth month of the Hijri year 1391 AH, which is Dhu Al-Hijjah of 1391 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1391/12/30 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 15 February 1972 to its equivalent Arabic date.
The following is the conversion of the Arabic date 30 Dhul Hijjah 1391 AH to its equivalent Gregorian date.
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ ٱتَّقُوا۟ ٱللَّهَ وَءَامِنُوا۟ بِرَسُولِهِۦ يُؤْتِكُمْ كِفْلَيْنِ مِن رَّحْمَتِهِۦ وَيَجْعَل لَّكُمْ نُورًۭا تَمْشُونَ بِهِۦ وَيَغْفِرْ لَكُمْ ۚ وَٱللَّهُ غَفُورٌۭ رَّحِيمٌۭ
O ye who believe! Be mindful of your duty to Allah and put faith in His messenger. He will give you twofold of His mercy and will appoint for you a light wherein ye shall walk, and will forgive you. Allah is Forgiving, Merciful;
Surah Al-Hadid(57:28)
Sahih al-Bukhari
Fasting
Chapter: Siwak for the person observing Saum (fast)
Narrated Humran:
I saw `Uthman performing ablution; he washed his hands thrice, rinsed his mouth and then washed his nose, by putting water in it and then blowing it out, and washed his face thrice, and then washed his right forearm up to the elbow thrice, and then the left-forearm up to the elbow thrice, then smeared his head with water, washed his right foot thrice, and then his left foot thrice and said, "I saw Allah's Apostle performing ablution similar to my present ablution, and then he said, 'Whoever performs ablution like my present ablution and then offers two rak`at in which he does not think of worldly things, all his previous sins will be forgiven."
Sahih al-Bukhari 1934