Well, the Hijri date 13 Rajab 1370 corresponds to the Gregorian date Thursday, 19 April 1951. This date lies in the seventh month of the Hijri year 1370 AH, which is Rajab of 1370 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1370/07/13 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 19 April 1951 to its equivalent Arabic date.
The following is the conversion of the Arabic date 13 Rajab 1370 AH to its equivalent Gregorian date.
عَلَّمَهُۥ شَدِيدُ ٱلْقُوَىٰ
Which one of mighty powers hath taught him,
Surah An-Najm(53:5)
Sahih al-Bukhari
Jizyah and Mawaada'ah
Chapter: The sin of a person who makes a covenant and then proves treacherous
Narrated `Ali:
We did not, write anything from the Prophet (ﷺ) except the Qur'an and what is written in this paper, (wherein) the Prophet (ﷺ) said, "Medina is a sanctuary from (the mountain of) Air to so and-so, therefore, whoever innovates (in it) an heresy or commits a sin, or gives shelter to such an innovator, will incur the Curse of Allah. the angels and all the people; and none of his compulsory or optional good deeds of worship will be accepted And the asylum granted by any Muslim Is to be secured by all the Muslims even if it is granted by one of the lowest social status among them. And whoever betrays a Muslim in this respect will incur the Curse of Allah, the angels and all the people, and his compulsory and optional good deeds of worship will not be accepted. And any freed slave will take as masters (befriends) people other than his own real masters who freed him without taking the permission of the latter, will incur the Curse of Allah, the angels and all the people, and his compulsory and optional good deeds of worship will not be accepted."
Sahih al-Bukhari 3179