Well, the Hijri date 11 Muharram 1418 corresponds to the Gregorian date Saturday, 17 May 1997. This date lies in the first month of the Hijri year 1418 AH, which is Muharram of 1418 AH. Both this Hijri and Gregorian date occur on the single day that is Saturday without any doubt. The Arabic date 1418/01/11 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 17 May 1997 to its equivalent Arabic date.
The following is the conversion of the Arabic date 11 Muharram 1418 AH to its equivalent Gregorian date.
إِن تَسْتَفْتِحُوا۟ فَقَدْ جَآءَكُمُ ٱلْفَتْحُ ۖ وَإِن تَنتَهُوا۟ فَهُوَ خَيْرٌۭ لَّكُمْ ۖ وَإِن تَعُودُوا۟ نَعُدْ وَلَن تُغْنِىَ عَنكُمْ فِئَتُكُمْ شَيْـًۭٔا وَلَوْ كَثُرَتْ وَأَنَّ ٱللَّهَ مَعَ ٱلْمُؤْمِنِينَ
(O Qureysh!) If ye sought a judgment, now hath the judgment come unto you. And if ye cease (from persecuting the believers) it will be better for you, but if ye return (to the attack) We also shall return. And your host will avail you naught, however numerous it be, and (know) that Allah is with the believers (in His Guidance).
Surah Al-Anfaal(8:19)