Well, the Hijri date 7 Safar 1421 corresponds to the Gregorian date Thursday, 11 May 2000. This date lies in the second month of the Hijri year 1421 AH, which is Safar of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1421/02/07 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 11 May 2000 to its equivalent Arabic date.
The following is the conversion of the Arabic date 7 Safar 1421 AH to its equivalent Gregorian date.
وَجَعَلْنَا ٱلسَّمَآءَ سَقْفًۭا مَّحْفُوظًۭا ۖ وَهُمْ عَنْ ءَايَٰتِهَا مُعْرِضُونَ
And we have made the sky a roof withheld (from them). Yet they turn away from its portents.
Surah Al-Anbiyaa(21:32)
Sahih al-Bukhari
Witr Prayer
Chapter: The timing of the Salat-ul-Witr (Witr prayer)
Narrated `Aisha:
Allah's Messenger (ﷺ) offered witr prayer at different nights at various hours extending (from the `Isha' prayer) up to the last hour of the night.
Sahih al-Bukhari 996