Well, the Hijri date 10 Dhul Hijjah 1400 corresponds to the Gregorian date Sunday, 19 October 1980. This date lies in the twelfth month of the Hijri year 1400 AH, which is Dhu Al-Hijjah of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Sunday without any doubt. The Arabic date 1400/12/10 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 19 October 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 10 Dhul Hijjah 1400 AH to its equivalent Gregorian date.
فَلِذَٰلِكَ فَٱدْعُ ۖ وَٱسْتَقِمْ كَمَآ أُمِرْتَ ۖ وَلَا تَتَّبِعْ أَهْوَآءَهُمْ ۖ وَقُلْ ءَامَنتُ بِمَآ أَنزَلَ ٱللَّهُ مِن كِتَٰبٍۢ ۖ وَأُمِرْتُ لِأَعْدِلَ بَيْنَكُمُ ۖ ٱللَّهُ رَبُّنَا وَرَبُّكُمْ ۖ لَنَآ أَعْمَٰلُنَا وَلَكُمْ أَعْمَٰلُكُمْ ۖ لَا حُجَّةَ بَيْنَنَا وَبَيْنَكُمُ ۖ ٱللَّهُ يَجْمَعُ بَيْنَنَا ۖ وَإِلَيْهِ ٱلْمَصِيرُ
Unto this, then, summon (O Muhammad). And be thou upright as thou art commanded, and follow not their lusts, but say: I believe in whatever scripture Allah hath sent down, and I am commanded to be just among you. Allah is our Lord and your Lord. Unto us our works and unto you your works; no argument between us and you. Allah will bring us together, and unto Him is the journeying.
Surah Ash-Shura(42:15)