Well, the Hijri date 12 Dhul Hijjah 1378 corresponds to the Gregorian date Thursday, 18 June 1959. This date lies in the twelfth month of the Hijri year 1378 AH, which is Dhu Al-Hijjah of 1378 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1378/12/12 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 18 June 1959 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Dhul Hijjah 1378 AH to its equivalent Gregorian date.
قَدِ ٱفْتَرَيْنَا عَلَى ٱللَّهِ كَذِبًا إِنْ عُدْنَا فِى مِلَّتِكُم بَعْدَ إِذْ نَجَّىٰنَا ٱللَّهُ مِنْهَا ۚ وَمَا يَكُونُ لَنَآ أَن نَّعُودَ فِيهَآ إِلَّآ أَن يَشَآءَ ٱللَّهُ رَبُّنَا ۚ وَسِعَ رَبُّنَا كُلَّ شَىْءٍ عِلْمًا ۚ عَلَى ٱللَّهِ تَوَكَّلْنَا ۚ رَبَّنَا ٱفْتَحْ بَيْنَنَا وَبَيْنَ قَوْمِنَا بِٱلْحَقِّ وَأَنتَ خَيْرُ ٱلْفَٰتِحِينَ
We should have invented a lie against Allah if we returned to your religion after Allah hath rescued us from it. It is not for us to return to it unless Allah our Lord should (so) will. Our Lord comprehendeth all things in knowledge. In Allah do we put our trust. Our Lord! Decide with truth between us and our folk, for Thou art the best of those who make decision.
Surah Al-A'raaf(7:89)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"And when We have recited it to you [O Muḥammad PBUH through Jibril (Gabriel) a.s.], then follow its (the Qur'an's) recital." (V.75:18)
Narrated Ibn `Abbas:
(as regards) Allah's Statement: "Move not your tongue concerning (the Qur'an) to make haste therewith." (75.16) When Gabriel revealed the Divine Inspiration in Allah's Messenger (ﷺ) , he (Allah's Messenger (ﷺ)) moved his tongue and lips, and that state used to be very hard for him, and that movement indicated that revelation was taking place. So Allah revealed in Surat Al-Qiyama which begins: 'I do swear by the Day of Resurrection...' (75) the Verses:-- 'Move not your tongue concerning (the Qur'an) to make haste therewith. It is for Us to collect it (Qur'an) in your mind, and give you the ability to recite it by heart. (75.16-17) Ibn `Abbas added: It is for Us to collect it (Qur'an) (in your mind), and give you the ability to recite it by heart means, "When We reveal it, listen. Then it is for Us to explain it," means, 'It is for us to explain it through your tongue.' So whenever Gabriel came to Allah's Messenger (ﷺ) ' he would keep quiet (and listen), and when the Angel left, the Prophet (ﷺ) would recite that revelation as Allah promised him.
Sahih al-Bukhari 4929