The servants of Aba al-Fadl al-Abbas (peace be upon him) extended their congratulations to their master on the birth anniversary of his brother Imam al-Hassan al-Mojtaba (peace be upon him), through the ritual they held usually every Monday and Thursday. And this Thursday coincides with the celebration of the birth anniversary and they are sharing the joys of the lovers and followers of Ahl al-Bayt (peace be upon them) wherever they are, chanting poems and verses of love of Imam al-Hassan (peace be upon him) on this day of the fifteenth of the holy month of Ramadhan.
It is noteworthy that the birth of Imam al-Hassan son of the Commander of the Faithful Ali Ibn abi Taleb (peace be upon all of them) was in the third year of Hijra on the Fifteenth of the holy month of Ramadhan. Gabriel descended from heaven on the Apostle of Allah (Allah's prayers be upon him and upon his holy Household) saying: The Almighty send you His Salam and tell you to name him Hassan. And so it was. Then the Holy Prophet (Allah's prayers be upon him and upon his holy Household) sacrificed a ram for him (in the ceremony of ‘Aqiqa). Then he (Allah's prayers be upon him and upon his holy Household) shaved his hair, gave silver equal to his hair, and gave him the title of "Aba Mohammad".