Well, the Hijri date 18 Rabi Al Thani 1388 corresponds to the Gregorian date Saturday, 13 July 1968. This date lies in the fourth month of the Hijri year 1388 AH, which is Rabi Al-Thani of 1388 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1388/04/18 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 July 1968 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Rabi Al Thani 1388 AH to its equivalent Gregorian date.
وَلَقَدْ بَعَثْنَا فِى كُلِّ أُمَّةٍۢ رَّسُولًا أَنِ ٱعْبُدُوا۟ ٱللَّهَ وَٱجْتَنِبُوا۟ ٱلطَّٰغُوتَ ۖ فَمِنْهُم مَّنْ هَدَى ٱللَّهُ وَمِنْهُم مَّنْ حَقَّتْ عَلَيْهِ ٱلضَّلَٰلَةُ ۚ فَسِيرُوا۟ فِى ٱلْأَرْضِ فَٱنظُرُوا۟ كَيْفَ كَانَ عَٰقِبَةُ ٱلْمُكَذِّبِينَ
And verily We have raised in every nation a messenger, (proclaiming): Serve Allah and shun false gods. Then some of them (there were) whom Allah guided, and some of them (there were) upon whom error had just hold. Do but travel in the land and see the nature of the consequence for the deniers!
Surah An-Nahl(16:36)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: The dispatch of Usama bin Zaid to Al-Huraqat
Narrated Usama bin Zaid:
Allah's Messenger (ﷺ) sent us towards Al-Huruqa, and in the morning we attacked them and defeated them. I and an Ansari man followed a man from among them and when we took him over, he said, "La ilaha illal-Lah." On hearing that, the Ansari man stopped, but I killed him by stabbing him with my spear. When we returned, the Prophet (ﷺ) came to know about that and he said, "O Usama! Did you kill him after he had said "La ilaha ilal-Lah?" I said, "But he said so only to save himself." The Prophet (ﷺ) kept on repeating that so often that I wished I had not embraced Islam before that day.
Sahih al-Bukhari 4269