Well, the Hijri date 21 Shaban 1377 corresponds to the Gregorian date Tuesday, 11 March 1958. This date lies in the eighth month of the Hijri year 1377 AH, which is Shaban of 1377 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1377/08/21 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 11 March 1958 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shaban 1377 AH to its equivalent Gregorian date.
وَٱعْلَمُوٓا۟ أَنَّمَآ أَمْوَٰلُكُمْ وَأَوْلَٰدُكُمْ فِتْنَةٌۭ وَأَنَّ ٱللَّهَ عِندَهُۥٓ أَجْرٌ عَظِيمٌۭ
And know that your possessions and your children are a test, and that with Allah is immense reward.
Surah Al-Anfaal(8:28)
Sahih al-Bukhari
Fasting
Chapter: Should it be said "Ramadan" or "the month of Ramadan"? And whoever thinks that both are permissible
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "When Ramadan begins, the gates of Paradise are opened."
Sahih al-Bukhari 1898