Well, the Hijri date 27 Rajab 1377 corresponds to the Gregorian date Saturday, 15 February 1958. This date lies in the seventh month of the Hijri year 1377 AH, which is Rajab of 1377 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1377/07/27 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 15 February 1958 to its equivalent Arabic date.
The following is the conversion of the Arabic date 27 Rajab 1377 AH to its equivalent Gregorian date.
إِلَىٰ يَوْمِ ٱلْوَقْتِ ٱلْمَعْلُومِ
Till the Day of appointed time.
Surah Al-Hijr(15:38)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
The Statement of Allah J: "And even if you were to bring to the people of the Scripture (Jews and Christians), all the Ayãt (proofs, evidences, verses, lessons, signs, revelations,-etc.) they would not follow your Qiblah (prayer direction)..." (V.2:145)
Narrated Ibn `Umar:
While some people were offering morning prayer at Quba' a man came to them and said, "A Qur'anic Order has been revealed to Allah's Messenger (ﷺ) tonight that he should face the Ka`ba at Mecca (in prayer), so you too should turn your faces towards it." At that moment their faces were towards Sham (i.e. Jerusalem) (and on hearing that) they turned towards the Ka`ba (at Mecca).
Sahih al-Bukhari 4490