Well, the Hijri date 21 Shawwal 1435 corresponds to the Gregorian date Sunday, 17 August 2014. This date lies in the tenth month of the Hijri year 1435 AH, which is Shawwal of 1435 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1435/10/21 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 August 2014 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shawwal 1435 AH to its equivalent Gregorian date.
وَمِنَ ٱلَّيْلِ فَتَهَجَّدْ بِهِۦ نَافِلَةًۭ لَّكَ عَسَىٰٓ أَن يَبْعَثَكَ رَبُّكَ مَقَامًۭا مَّحْمُودًۭا
And some part of the night awake for it, a largess for thee. It may be that thy Lord will raise thee to a praised estate.
Surah Al-Israa(17:79)