On 3rd Shaban Hazrat Imam Hussain ( A.S) born
And on 4th Shaban Hazrat Ghazi Abbas ( A.S) born

Both these days are very important for muslims.
And many muslime celebrate these days properly

Specially Shia Sect because
These two personalities save Islam
And last savior of Islam who stand infront of
Yazeed maloon on 10th Muharram in Karbala
And got Shadat