Zilhajj dates of significance

Image via WikipediaImportance of the sacred month of Zilhajj

From ziaraat.com:

1st – Marriage of Imam Ali (A.S.) and Hazrat Fatima Zahra (S.A.)
7th – Martyrdom of Imam Mohammad Baqir (a.s.) – 114 A.H.
9th – Day of Arafa – Martyrdom of Hazrat Muslim ibn-e-Aqeel (a.s.)
10th – Hajj-e-Baitullah and Eid-ul-Azha
15th – Birth anniversary of Imam Ali Naqi (a.s.) – 212 A.H.
18th – Eid-e-Ghadeer – 10 A.H.
19th or 23rd – Martyrdom of Hazrat Meesum-e-Tammar (a.r.)
22nd - Martyrdom of Sons of Hazrat Muslim (A.S.)
24th – Eid-e-Mubahila – 10 A.H.
24th – Supplication day and giving of alms during Rukoo by Imam Ali (A.S.)
25th – Acceptance of formal Khilafat by Imam Ali (A.S.)