Well, the Hijri date 18 Muharram 1403 corresponds to the Gregorian date Thursday, 4 November 1982. This date lies in the first month of the Hijri year 1403 AH, which is Muharram of 1403 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1403/01/18 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 4 November 1982 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Muharram 1403 AH to its equivalent Gregorian date.
قَدْ نَعْلَمُ إِنَّهُۥ لَيَحْزُنُكَ ٱلَّذِى يَقُولُونَ ۖ فَإِنَّهُمْ لَا يُكَذِّبُونَكَ وَلَٰكِنَّ ٱلظَّٰلِمِينَ بِـَٔايَٰتِ ٱللَّهِ يَجْحَدُونَ
We know well how their talk grieveth thee, though in truth they deny not thee (Muhammad) but evil-doers flout the revelations of Allah.
Surah Al-An'aam(6:33)
Sahih al-Bukhari
Shortening the Prayers (At-Taqseer)
Chapter: Whoever did not offer the Nawafil before and after the (compulsory) Salat during a journey
Narrated Hafs bin `Asim:
Ibn `Umar went on a journey and said, "I accompanied the Prophet (ﷺ) and he did not offer optional prayers during the journey, and Allah says: 'Verily! In Allah's Messenger (ﷺ) you have a good example to follow.' " (33.21)
Sahih al-Bukhari 1101