Well, the Hijri date 27 Muharram 1366 corresponds to the Gregorian date Friday, 20 December 1946. This date lies in the first month of the Hijri year 1366 AH, which is Muharram of 1366 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1366/01/27 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 20 December 1946 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Muharram 1366 AH to its equivalent Gregorian date.
۞ وَٱذْكُرُوا۟ ٱللَّهَ فِىٓ أَيَّامٍۢ مَّعْدُودَٰتٍۢ ۚ فَمَن تَعَجَّلَ فِى يَوْمَيْنِ فَلَآ إِثْمَ عَلَيْهِ وَمَن تَأَخَّرَ فَلَآ إِثْمَ عَلَيْهِ ۚ لِمَنِ ٱتَّقَىٰ ۗ وَٱتَّقُوا۟ ٱللَّهَ وَٱعْلَمُوٓا۟ أَنَّكُمْ إِلَيْهِ تُحْشَرُونَ
Remember Allah through the appointed days. Then whoso hasteneth (his departure) by two days, it is no sin for him, and whoso delayeth, it is no sin for him; that is for him who wardeth off (evil). Be careful of your duty to Allah, and know that unto Him ye will be gathered.
Surah Al-Baqara(2:203)