Well, the Hijri date 28 Shawwal 1421 corresponds to the Gregorian date Tuesday, 23 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 1421/10/28 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 23 January 2001 to its equivalent Arabic date.
The following is the conversion of the Arabic date 28 Shawwal 1421 AH to its equivalent Gregorian date.
كَيْفَ يَكُونُ لِلْمُشْرِكِينَ عَهْدٌ عِندَ ٱللَّهِ وَعِندَ رَسُولِهِۦٓ إِلَّا ٱلَّذِينَ عَٰهَدتُّمْ عِندَ ٱلْمَسْجِدِ ٱلْحَرَامِ ۖ فَمَا ٱسْتَقَٰمُوا۟ لَكُمْ فَٱسْتَقِيمُوا۟ لَهُمْ ۚ إِنَّ ٱللَّهَ يُحِبُّ ٱلْمُتَّقِينَ
How can there be a treaty with Allah and with His messenger for the idolaters save those with whom ye made a treaty at the Inviolable Place of Worship? So long as they are true to you, be true to them. Lo! Allah loveth those who keep their duty.
Surah At-Tawba(9:7)
Sahih al-Bukhari
Holding Fast to the Qur'an and Sunnah
Chapter: Asking too many questions and troubling with what does not concern one
Narrated Ibn Masud:
I was with the Prophet (ﷺ) at one of the farms of Medina while he was leaning on a date palm leaf-stalk. He passed by a group of Jews and some of them said to the other, Ask him (the Prophet) about the spirit. Some others said, "Do not ask him, lest he should tell you what you dislike" But they went up to him and said, "O Abal Qasim! Inform us bout the spirit." The Prophet (ﷺ) stood up for a while, waiting. I realized that he was being Divinely Inspired, so I kept away from him till the inspiration was over. Then the Prophet (ﷺ) said, "(O Muhammad) they ask you regarding the spirit, Say: The spirit its knowledge is with my Lord (i.e., nobody has its knowledge except Allah)" (17.85) (This is a miracle of the Qur'an that all the scientists up till now do not know about the spirit, i.e, how life comes to a body and how it goes away at its death) (See Hadith No. 245, Vol. 6)
Sahih al-Bukhari 7297