Well, the Hijri date 18 Rajab 1403 corresponds to the Gregorian date Sunday, 1 May 1983. This date lies in the seventh month of the Hijri year 1403 AH, which is Rajab of 1403 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1403/07/18 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 1 May 1983 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rajab 1403 AH to its equivalent Gregorian date.
وَقِهِمُ ٱلسَّيِّـَٔاتِ ۚ وَمَن تَقِ ٱلسَّيِّـَٔاتِ يَوْمَئِذٍۢ فَقَدْ رَحِمْتَهُۥ ۚ وَذَٰلِكَ هُوَ ٱلْفَوْزُ ٱلْعَظِيمُ
And ward off from them ill-deeds; and he from whom Thou wardest off ill-deeds that day, him verily hast Thou taken into mercy. That is the supreme triumph.
Surah Ghafir(40:9)
Sahih al-Bukhari
Knowledge
Chapter: The sin of a person who tells a lie against the Prophet (saws)
Narrated `Ali:
The Prophet (ﷺ) said, "Do not tell a lie against me for whoever tells a lie against me (intentionally) then he will surely enter the Hell-fire."
Sahih al-Bukhari 106