Well, the Hijri date 4 Shawwal 1439 corresponds to the Gregorian date Monday, 18 June 2018. This date lies in the tenth month of the Hijri year 1439 AH, which is Shawwal of 1439 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1439/10/04 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 18 June 2018 to its equivalent Arabic date.
The following is the conversion of the Arabic date 4 Shawwal 1439 AH to its equivalent Gregorian date.
أَعَدَّ ٱللَّهُ لَهُمْ عَذَابًۭا شَدِيدًا ۖ إِنَّهُمْ سَآءَ مَا كَانُوا۟ يَعْمَلُونَ
Allah hath prepared for them a dreadful doom. Evil indeed is that which they are wont to do.
Surah Al-Mujaadila(58:15)
Sahih al-Bukhari
Invoking Allah for Rain (Istisqaa)
Chapter: Going out of the Prophet (pbuh) to offer Istisqa' prayer
Narrated `Abbad bin Tamim's uncle:
The Prophet (p.b.u.h) went out to offer the Istisqa' prayer and turned (and put on) his cloak inside out.
Sahih al-Bukhari 1005