Well, the Hijri date 21 Safar 1490 corresponds to the Gregorian date Thursday, 5 May 2067. This date lies in the second month of the Hijri year 1490 AH, which is Safar of 1490 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1490/02/21 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 5 May 2067 to its equivalent Arabic date.
The following is the conversion of the Arabic date 21 Safar 1490 AH to its equivalent Gregorian date.
ٱلَّذِينَ ءَاتَيْنَٰهُمُ ٱلْكِتَٰبَ يَعْرِفُونَهُۥ كَمَا يَعْرِفُونَ أَبْنَآءَهُمْ ۖ وَإِنَّ فَرِيقًۭا مِّنْهُمْ لَيَكْتُمُونَ ٱلْحَقَّ وَهُمْ يَعْلَمُونَ
Those unto whom We gave the Scripture recognise (this revelation) as they recognise their sons. But lo! a party of them knowingly conceal the truth.
Surah Al-Baqara(2:146)