Well, the Hijri date 26 Dhul Qidah 1421 corresponds to the Gregorian date Tuesday, 20 February 2001. This date lies in the eleventh month of the Hijri year 1421 AH, which is Dhu Al-Qidah of 1421 AH. Both this Hijri and Gregorian date occur on the single day that is Tuesday without any doubt. The Arabic date 1421/11/26 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 20 February 2001 to its equivalent Arabic date.
The following is the conversion of the Arabic date 26 Dhul Qidah 1421 AH to its equivalent Gregorian date.
وَمَآ أُمِرُوٓا۟ إِلَّا لِيَعْبُدُوا۟ ٱللَّهَ مُخْلِصِينَ لَهُ ٱلدِّينَ حُنَفَآءَ وَيُقِيمُوا۟ ٱلصَّلَوٰةَ وَيُؤْتُوا۟ ٱلزَّكَوٰةَ ۚ وَذَٰلِكَ دِينُ ٱلْقَيِّمَةِ
And they are ordered naught else than to serve Allah, keeping religion pure for Him, as men by nature upright, and to establish worship and to pay the poor-due. That is true religion.
Surah Al-Bayyina(98:5)
Sahih al-Bukhari
Prayer at Night (Tahajjud)
Chapter: To offer two Rak'at before the Fajr prayer
Narrated `Aisha:
Allah's Messenger (ﷺ) used to offer thirteen rak`at in the night prayer and on hearing the Adhan for the morning prayer, he used to offer two light rak`at.
Sahih al-Bukhari 1164