Safar is second month of Islamic year, In islamic history Islamic month of Safar preserve so many historic movements and events some are as below : 

Hijri Date Events
10 Safar Wafat of Bibi Sakina (A.S.)
20 Safar Arbayeen (Chehulam)
28 Safar Wafat of Prophet Muhammad (S.A.W.)
28 Safar Shahadat of Imam Hassan (A.S)
29 Safar Shahadat of 8th Imam Ali ar-Ridha (A.S.)