Well, the Hijri date 20 Rabi Al Thani 1451 corresponds to the Gregorian date Thursday, 30 August 2029. This date lies in the fourth month of the Hijri year 1451 AH, which is Rabi Al-Thani of 1451 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1451/04/20 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 30 August 2029 to its equivalent Arabic date.
The following is the conversion of the Arabic date 20 Rabi Al Thani 1451 AH to its equivalent Gregorian date.
أَمِ ٱتَّخَذُوا۟ مِن دُونِهِۦٓ ءَالِهَةًۭ ۖ قُلْ هَاتُوا۟ بُرْهَٰنَكُمْ ۖ هَٰذَا ذِكْرُ مَن مَّعِىَ وَذِكْرُ مَن قَبْلِى ۗ بَلْ أَكْثَرُهُمْ لَا يَعْلَمُونَ ٱلْحَقَّ ۖ فَهُم مُّعْرِضُونَ
Or have they chosen other gods beside Him? say: Bring your proof (of their godhead). This is the Reminder of those with me and those before me, but most of them know not the Truth and so they are averse.
Surah Al-Anbiyaa(21:24)
Sahih al-Bukhari
To make the Heart Tender (Ar-Riqaq)
Chapter: Seventy thousand will enter Paradise without accounts.
Narrated Ibn `Abbas:
The Prophet (ﷺ) said, "The people were displayed in front of me and I saw one prophet passing by with a large group of his followers, and another prophet passing by with only a small group of people, and another prophet passing by with only ten (persons), and another prophet passing by with only five (persons), and another prophet passed by alone. And then I looked and saw a large multitude of people, so I asked Gabriel, "Are these people my followers?' He said, 'No, but look towards the horizon.' I looked and saw a very large multitude of people. Gabriel said. 'Those are your followers, and those are seventy thousand (persons) in front of them who will neither have any reckoning of their accounts nor will receive any punishment.' I asked, 'Why?' He said, 'For they used not to treat themselves with branding (cauterization) nor with Ruqya (get oneself treated by the recitation of some Verses of the Qur'an) and not to see evil omen in things, and they used to put their trust (only) in their Lord." On hearing that, 'Ukasha bin Mihsan got up and said (to the Prophet), "Invoke Allah to make me one of them." The Prophet (ﷺ) said, "O Allah, make him one of them." Then another man got up and said (to the Prophet), "Invoke Allah to make me one of them." The Prophet (ﷺ) said, 'Ukasha has preceded you."
Sahih al-Bukhari 6541