Well, the Hijri date 18 Rajab 1399 corresponds to the Gregorian date Wednesday, 13 June 1979. This date lies in the seventh month of the Hijri year 1399 AH, which is Rajab of 1399 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1399/07/18 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 13 June 1979 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rajab 1399 AH to its equivalent Gregorian date.
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ تُوبُوٓا۟ إِلَى ٱللَّهِ تَوْبَةًۭ نَّصُوحًا عَسَىٰ رَبُّكُمْ أَن يُكَفِّرَ عَنكُمْ سَيِّـَٔاتِكُمْ وَيُدْخِلَكُمْ جَنَّٰتٍۢ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ يَوْمَ لَا يُخْزِى ٱللَّهُ ٱلنَّبِىَّ وَٱلَّذِينَ ءَامَنُوا۟ مَعَهُۥ ۖ نُورُهُمْ يَسْعَىٰ بَيْنَ أَيْدِيهِمْ وَبِأَيْمَٰنِهِمْ يَقُولُونَ رَبَّنَآ أَتْمِمْ لَنَا نُورَنَا وَٱغْفِرْ لَنَآ ۖ إِنَّكَ عَلَىٰ كُلِّ شَىْءٍۢ قَدِيرٌۭ
O ye who believe! Turn unto Allah in sincere repentance! It may be that your Lord will remit from you your evil deeds and bring you into Gardens underneath which rivers flow, on the day when Allah will not abase the Prophet and those who believe with him. Their light will run before them and on their right hands; they will say: Our Lord! Perfect our light for us, and forgive us! Lo! Thou art Able to do all things.
Surah At-Tahrim(66:8)
Sahih al-Bukhari
Jizyah and Mawaada'ah
Chapter: To whom should the Fai and the Jizya be distributed?
Narrated Jabir bin `Abdullah:
Allah's Messenger (ﷺ) once said to me, "If the revenue of Bahrain came, I would give you this much and this much." When Allah's Messenger (ﷺ) had died, the revenue of Bahrain came, and Abu Bakr announced, " Let whoever was promised something by Allah's Messenger (ﷺ) come to me." So, I went to Abu Bakr and said, "Allah's Messenger (ﷺ) said to me, 'If the revenue of Bahrain came, I would give you this much and this. much." On that Abu Bakr said to me, "Scoop (money) with both your hands." I scooped money with both my hands and Abu Bakr asked me to count it. I counted it and it was five-hundred (gold pieces). The total amount he gave me was one thousand and five hundred (gold pieces.) Narrated Anas: Money from Bahrain was brought to the Prophet (ﷺ) . He said, "Spread it in the Mosque." It was the biggest amount that had ever been brought to Allah's Messenger (ﷺ) . In the meantime Al-`Abbas came to him and said, "O Allah's Messenger (ﷺ)! Give me, for I gave the ransom of myself and `Aqil." The Prophet said (to him), "Take." He scooped money with both hands and poured it in his garment and tried to lift it, but he could not and appealed to the Prophet, "Will you order someone to help me in lifting it?" The Prophet (ﷺ) said, "No." Then Al-`Abbas said, "Then will you yourself help me carry it?" The Prophet (ﷺ) said, "No." Then Al `Abbas threw away some of the money, but even then he was not able to lift it, and so he gain requested the Prophet (ﷺ) "Will you order someone to help me carry it?" The Prophet said, "No." Then Al-`Abbas said, "Then will you yourself yelp me carry it?" The Prophet (ﷺ) said, 'No." So, Al-`Abbas threw away some more money and lifted it on his shoulder and went away. The Prophet (ﷺ) kept on looking at him with astonishment at his greediness till he went out of our sight. Allah's Messenger (ﷺ) did not get up from there till not a single Dirham remained from that money.
Sahih al-Bukhari 3164, 3165