Well, the Hijri date 26 Jumada Al Oula 1378 corresponds to the Gregorian date Sunday, 7 December 1958. This date lies in the fifth month of the Hijri year 1378 AH, which is Jumada Al-Awwal of 1378 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1378/05/26 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 7 December 1958 to its equivalent Arabic date.
The following is the conversion of the Arabic date 26 Jumada Al Oula 1378 AH to its equivalent Gregorian date.
وَبَيْنَهُمَا حِجَابٌۭ ۚ وَعَلَى ٱلْأَعْرَافِ رِجَالٌۭ يَعْرِفُونَ كُلًّۢا بِسِيمَىٰهُمْ ۚ وَنَادَوْا۟ أَصْحَٰبَ ٱلْجَنَّةِ أَن سَلَٰمٌ عَلَيْكُمْ ۚ لَمْ يَدْخُلُوهَا وَهُمْ يَطْمَعُونَ
Between them is a veil. And on the Heights are men who know them all by their marks. And they call unto the dwellers of the Garden: Peace be unto you! They enter it not although they hope (to enter).
Surah Al-A'raaf(7:46)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
Allah's Statement: "Verily! In the creation of the heavens and the earth, and in the alternation of night and day, there are indeed signs for men of understanding." (V.3:190)
Narrated Ibn `Abbas:
I stayed overnight in the house of my aunt Maimuna. Allah's Messenger (ﷺ) talked with his wife for a while and then went to bed. When it was the last third of the night, he got up and looked towards the sky and said: "Verily! In the creation of the Heavens and the Earth and in the alteration of night and day, there are indeed signs for men of understanding." (3.190) Then he stood up, performed ablution, brushed his teeth with a Siwak, and then prayed eleven rak`at. Then Bilal pronounced the Adhan (i.e. call for the Fajr prayer). The Prophet (ﷺ) then offered two rak`at (Sunna) prayer and went out (to the Mosque) and offered the (compulsory congregational) Fajr prayer.
Sahih al-Bukhari 4569