Well, the Hijri date 15 Jumada Al Akhira 1403 corresponds to the Gregorian date Tuesday, 29 March 1983. This date lies in the sixth month of the Hijri year 1403 AH, which is Jumada Al-Thani of 1403 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1403/06/15 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 29 March 1983 to its equivalent Arabic date.
The following is the conversion of the Arabic date 15 Jumada Al Akhira 1403 AH to its equivalent Gregorian date.
وَإِذَا دُعُوٓا۟ إِلَى ٱللَّهِ وَرَسُولِهِۦ لِيَحْكُمَ بَيْنَهُمْ إِذَا فَرِيقٌۭ مِّنْهُم مُّعْرِضُونَ
And when they appeal unto Allah and His messenger to judge between them, lo! a faction of them are averse;
Surah An-Noor(24:48)
Sahih al-Bukhari
Fasting
Chapter: "Start observing Saum on seeing the crescent of Ramadan, and stop on seeing the crescent (of Shawwal)."
Narrated `Abdullah bin `Umar:
Allah's Messenger (ﷺ) mentioned Ramadan and said, "Do not fast unless you see the crescent (of Ramadan), and do not give up fasting till you see the crescent (of Shawwal), but if the sky is overcast (if you cannot see it), then act on estimation (i.e. count Sha'ban as 30 days).
Sahih al-Bukhari 1906