Well, the Hijri date 17 Rajab 1404 corresponds to the Gregorian date Wednesday, 18 April 1984. This date lies in the seventh month of the Hijri year 1404 AH, which is Rajab of 1404 AH. Both this Hijri and Gregorian date occur on the single day that is Wednesday without any doubt. The Arabic date 1404/07/17 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 18 April 1984 to its equivalent Arabic date.
The following is the conversion of the Arabic date 17 Rajab 1404 AH to its equivalent Gregorian date.
قَدْ خَلَتْ مِن قَبْلِكُمْ سُنَنٌۭ فَسِيرُوا۟ فِى ٱلْأَرْضِ فَٱنظُرُوا۟ كَيْفَ كَانَ عَٰقِبَةُ ٱلْمُكَذِّبِينَ
Systems have passed away before you. Do but travel in the land and see the nature of the consequence for those who did deny (the messengers).
Surah Aal-i-Imraan(3:137)
Sahih al-Bukhari
Fasting
Chapter: "The Adhan of Bilal should not stop you from taking Sahur"
Narrated `Aisha:
Bilal used to pronounce the Adhan at night, so Allah's Messenger (ﷺ)? said, "Carry on taking your meals (eat and drink) till Ibn Um Maktum pronounces the Adhan, for he does not pronounce it till it is dawn.
Sahih al-Bukhari 1918, 1919