Well, the Hijri date 1 Safar 1366 corresponds to the Gregorian date Tuesday, 24 December 1946. This date lies in the second month of the Hijri year 1366 AH, which is Safar of 1366 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1366/02/01 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 24 December 1946 to its equivalent Arabic date.
The following is the conversion of the Arabic date 1 Safar 1366 AH to its equivalent Gregorian date.
فَإِن كَذَّبُوكَ فَقُل رَّبُّكُمْ ذُو رَحْمَةٍۢ وَٰسِعَةٍۢ وَلَا يُرَدُّ بَأْسُهُۥ عَنِ ٱلْقَوْمِ ٱلْمُجْرِمِينَ
So if they give the lie to thee (Muhammad), say: Your Lord is a Lord of All-Embracing Mercy, and His wrath will never be withdrawn from guilty folk.
Surah Al-An'aam(6:147)
Sahih al-Bukhari
Fasting
Chapter: Observing Saum on the first day of 'Eid-ul-Fitr.
Narrated Abu `Ubaid:
(the slave of Ibn Azhar) I witnessed the `Id with `Umar bin Al-Khattab who said, Allah's Messenger (ﷺ) has forbidden people to fast on the day on which you break fasting (the fasts of Ramadan) and the day on which you eat the meat of your sacrifices (the first day of `Id ul Fitr and `Id ul-Adha).
Sahih al-Bukhari 1990