Jamadi-al-Awwal
5th - Birth of Hazrat Zainab bint-e-Ali(as) - (5 AH)
13th - Martyrdom of Hazrat Fatima Zehra(sa) - 11 AH
15th - Birth of Imam Zain al-Abideen(as) - the 4th Holy Imam - (38 AH)
17th - Battle of Jamal- 36 AH
Source - Azadari.com