Well, the Hijri date 23 Rajab 1378 corresponds to the Gregorian date Sunday, 1 February 1959. This date lies in the seventh month of the Hijri year 1378 AH, which is Rajab of 1378 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1378/07/23 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 1 February 1959 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Rajab 1378 AH to its equivalent Gregorian date.
ذَٰلِكَ بِأَنَّهُمُ ٱسْتَحَبُّوا۟ ٱلْحَيَوٰةَ ٱلدُّنْيَا عَلَى ٱلْءَاخِرَةِ وَأَنَّ ٱللَّهَ لَا يَهْدِى ٱلْقَوْمَ ٱلْكَٰفِرِينَ
That is because they have chosen the life of the world rather than the Hereafter, and because Allah guideth not the disbelieving folk.
Surah An-Nahl(16:107)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: The story of ‘Oman and Al-Bahrain
Narrated Jabir bin `Abdullah:
Allah's Messenger (ﷺ) said to me, "If the revenue of Al-Bahrain should come, I will give you so much and so much," repeating "so much" thrice. But the revenue of Al-Bahrain did not come till Allah's Messenger (ﷺ) had died. When the revenue came during the rule of Abu Bakr. Abu Bakr ordered an announcer to announce, "Whoever had any debt or promise due upon the Prophet, should present himself to me (i.e. Abu Bakr). I came to Abu Bakr and informed him that the Prophet (ﷺ) had said (to me), "If the revenue of Al-Bahrain should come, I will give you so-much and so much," repeating "so much" thrice. So Abu Bakr gave me (in another narration Jaibir said,). I met Abu Bakr after that and asked him (to give me what the Prophet (ﷺ) had promised me) but he did not give me. I again went to him but he did not give me. I again went to him (for the third time) but he did not give me; On that I said to him, "I came to you but you did not give me, then I came to you and you did not give me, and then again I came to you, but you did not give me; so you should either give me or else you are like a miserly to me, on that, Abu Bakr said, "Do you say, 'You are like a miserly to me?' There is no worse disease than miserliness." Abu Bakr said it thrice and added, "Whenever I refused to give you, I had the intention of giving you." (In another narration) Jabir bin `Abdullah said, "I went to Abu Bakr (and he gave me a handful of money) and told me to count it, I counted and found it five-hundred, and then Abu Bakr said (to me), "Take the same amount twice."
Sahih al-Bukhari 4383