Well, the Hijri date 18 Safar 1409 corresponds to the Gregorian date Thursday, 29 September 1988. This date lies in the second month of the Hijri year 1409 AH, which is Safar of 1409 AH. Both this Hijri and Gregorian date occur on the single day that is Thursday without any doubt. The Arabic date 1409/02/18 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 29 September 1988 to its equivalent Arabic date.
The following is the conversion of the Arabic date 18 Safar 1409 AH to its equivalent Gregorian date.
لَٰكِنِ ٱلَّذِينَ ٱتَّقَوْا۟ رَبَّهُمْ لَهُمْ غُرَفٌۭ مِّن فَوْقِهَا غُرَفٌۭ مَّبْنِيَّةٌۭ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ ۖ وَعْدَ ٱللَّهِ ۖ لَا يُخْلِفُ ٱللَّهُ ٱلْمِيعَادَ
But those who keep their duty to their Lord, for them are lofty halls with lofty halls above them, built (for them), beneath which rivers flow. (It is) a promise of Allah. Allah faileth not His promise.
Surah Az-Zumar(39:20)