Well, the Hijri date 21 Shawwal 1421 corresponds to the Gregorian date Tuesday, 16 January 2001. This date lies in the tenth month of the Hijri year 1421 AH, which is Shawwal of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1421/10/21 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 16 January 2001 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Shawwal 1421 AH to its equivalent Gregorian date.
فَإِذَا جَآءَ وَعْدُ أُولَىٰهُمَا بَعَثْنَا عَلَيْكُمْ عِبَادًۭا لَّنَآ أُو۟لِى بَأْسٍۢ شَدِيدٍۢ فَجَاسُوا۟ خِلَٰلَ ٱلدِّيَارِ ۚ وَكَانَ وَعْدًۭا مَّفْعُولًۭا
So when the time for the first of the two came, We roused against you slaves of Ours of great might who ravaged (your) country, and it was a threat performed.
Surah Al-Israa(17:5)
Sahih al-Bukhari
Times of the Prayers
Chapter: The time of the Maghrib prayer (evening prayer)
Narrated Jabir bin `Abdullah:
The Prophet (ﷺ) used to pray the Zuhr at midday, and the `Asr at a time when the sun was still bright, the Maghrib after sunset (at its stated time) and the `Isha at a variable time. Whenever he saw the people assembled (for `Isha' prayer) he would pray earlier and if the people delayed, he would delay the prayer. And they or the Prophet (ﷺ) used to offer the Fajr Prayers when it still dark.
Sahih al-Bukhari 560