عاشوراء
The Hosseini infancy conference (Persian: همایش شیرخوارگان حسینی "hamâyeš širxwargan Hasīnī") is a mourning custom of the Day of Ashura. It is held on the first Friday of Muharram in the Islamic calendar to commemorate the memory of Ali al-Asghar ibn Husayn, the six-month-old baby boy of Husayn ibn Ali and Umm Rubab, who was the youngest person killed in the Battle of Karbala.