Well, the Hijri date 23 Safar 1400 corresponds to the Gregorian date Friday, 11 January 1980. This date lies in the second month of the Hijri year 1400 AH, which is Safar of 1400 AH. Both this Hijri and Gregorian date occur on the single day that is Friday without any doubt. The Arabic date 1400/02/23 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 January 1980 to its equivalent Arabic date.
The following is the conversion of the Arabic date 23 Safar 1400 AH to its equivalent Gregorian date.
أَعَدَّ ٱللَّهُ لَهُمْ عَذَابًۭا شَدِيدًۭا ۖ فَٱتَّقُوا۟ ٱللَّهَ يَٰٓأُو۟لِى ٱلْأَلْبَٰبِ ٱلَّذِينَ ءَامَنُوا۟ ۚ قَدْ أَنزَلَ ٱللَّهُ إِلَيْكُمْ ذِكْرًۭا
Allah hath prepared for them stern punishment; so keep your duty to Allah, O men of understanding! O ye who believe! Now Allah hath sent down unto you a reminder,
Surah At-Talaaq(65:10)
Sahih al-Bukhari
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
"So whoever of you sights (the crescent on the first night of) the month (of Ramadan, i.e., is present at his home), he must observe Saum (fast) that month... (V.2:185)
Narrated Salama:
When the Divine Revelation: "For those who can fast, they had a choice either fast, or feed a poor for every day," (2.184) was revealed, it was permissible for one to give a ransom and give up fasting, till the Verse succeeding it was revealed and abrogated it.
Sahih al-Bukhari 4507