Well, the Hijri date 21 Rajab 1401 corresponds to the Gregorian date Monday, 25 May 1981. This date lies in the seventh month of the Hijri year 1401 AH, which is Rajab of 1401 AH. Both this Hijri and Gregorian date occur on the single day that is Monday without any doubt. The Arabic date 1401/07/21 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 25 May 1981 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Rajab 1401 AH to its equivalent Gregorian date.
وَقَالُوا۟ مَا لَنَا لَا نَرَىٰ رِجَالًۭا كُنَّا نَعُدُّهُم مِّنَ ٱلْأَشْرَارِ
And they say: What aileth us that we behold not men whom we were wont to count among the wicked?
Surah Saad(38:62)
Sahih al-Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Chapter: The story of the Ghazwa of Badr
Narrated Ka`b bin Malik:
I never failed to join Allah's Messenger (ﷺ) in any of his Ghazawat except in the Ghazwa of Tabuk. However, I did not take part in the Ghazwa of Badr, but none who failed to take part in it, was blamed, for Allah's Messenger (ﷺ) had gone out to meet the caravans of (Quraish, but Allah caused them (i.e. Muslims) to meet their enemy unexpectedly (with no previous intention) .
Sahih al-Bukhari 3951