Shawwal-ul-Mukarram

1st - Eid-ul-Fitr

3rd - Battle of Ohod & Martyrdom of Hazrat Hamza(ra) - (3 AH)

5th -Arrival of Hazrat Muslim ibn-e-Aqeel(as) in Kufa - (60 AH)

6th - Battle of Hunnain - (6 AH)

8th - Bombing of Jannat-ul-Baqi

9th - Battle of Khandaq - (5 AH)

10th - Start of Ghaibat-e-Kubra of Imam Mehdi(as) - (329 AH)

25th - Martyrdom of Imam Jafer Sadiq(as) - the 6th Holy Imam - (148 AH)

30th - Death of Hazrat Ibrahim(as) - son of Prophet Mohammad(sawaw) - (10 AH)

Source - Azadari.com