15th of ramadhan is the birthday of imam Hassan Mujtaba (A.S.)
He was bom on the 15 th of Ramdhan in the 3 rd year of, Hijra. His birth in the house of the Prophet (SAW) was the first happy event of its kind. When in Makkah male offspring of the Prophet (SAW) died one after the other and barring one daughter none survived, the polytheists began to taunt him calling him Abtar or heiriess. This hurt the Prophet (SAW) deeply and then 'Sura Kauser' was revealed in the Quran by way of solace to him. In this Sura happy tidings have been conveyed to the Prophet (SAW) saying that God has blessed him with plenty of offspring and that it is his enemies and not he that shall be heiriess. The birth of Imam Hasan(AS) in the very third year of arrival at Madinah was, so to say, the first exposition of 'Sura Kauser'. It is well known that it was Imam Hasan (AS) and Imam Husain (AS) through whom the progeny of the Prophet (SAW) spread in such abundance that till this day the world is overflowing with their descendants. There would scarcely be a place in any part of the world where persons belonging to this household may not be found. This, in spite of the fact that their enemies have ever been making every possible effort to obliterate them from the surface of the earth. Thousands of the Prophet's (SAW) descendants were hacked to death or hanged, or poisoned. On the other hand the offsprings of the Prophet's (Saw) enemies who were legion at that time have so disappeared from the world that not a trace of them is to be found anywhere. This is the living and lasting proof of the authenticity of the Quran and the veracity of the Prophet (SAW) for the world to see. For this reason, the pleasure of the Prophet (SAW) on the birth or Imam Hasan (AS) was not just what normally a maternal grandfather feels on the birth of a grandson. He was particularly happy because the first token of his truthfulness (in the person of this child) had arrived before the world. The Aqeeqa rites were performed on the seventh day and according to divine edict the Prophet (AS) named him as Hasan (AS). This name was not in vogue before the advent of Islam. It was for the first time that this child of the Prophet (AS) was given this name. Similarly, the name of his younger brother Husain (AS) was particular to him. No body was known by this name before him.
Source:
Week Tradition
الامام الصادق (علية السلام):
قَالَ اللَّهُ عَزَّ وَجَلَّ: «عَبْدِيَ المُؤْمِنُ لا أَصْرِفُهُ فِي شَيْءٍ إلّا جَعَلْتُهُ خَيْراً».






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