Well, the Hijri date 12 Shawwal 1378 corresponds to the Gregorian date Monday, 20 April 1959. This date lies in the tenth month of the Hijri year 1378 AH, which is Shawwal of 1378 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1378/10/12 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 20 April 1959 to its equivalent Arabic date.
The following is the conversion of the Arabic date 12 Shawwal 1378 AH to its equivalent Gregorian date.
وَإِن كَذَّبُوكَ فَقُل لِّى عَمَلِى وَلَكُمْ عَمَلُكُمْ ۖ أَنتُم بَرِيٓـُٔونَ مِمَّآ أَعْمَلُ وَأَنَا۠ بَرِىٓءٌۭ مِّمَّا تَعْمَلُونَ
And if they deny thee, say: Unto me my work, and unto you your work. Ye are innocent of what I do, and I am innocent of what ye do.
Surah Yunus(10:41)
Sahih al-Bukhari
Prophets
Chapter: The Statement of Allah Taa'la: "And Ayyub, when he cried to his Lord..."
Narrated Abu Huraira:
The Prophet (ﷺ) said, "While Job was naked, taking a bath, a swarm of gold locusts fell on him and he started collecting them in his garment. His Lord called him, 'O Job! Have I not made you rich enough to need what you see? He said, 'Yes, O Lord! But I cannot dispense with your Blessing."'
Sahih al-Bukhari 3391