From The Times of India
Over the past decade and half, Black Fridays and Terror Tuesdays have become a regular feature of newspaper headlines.  
While other days have also been chosen to carry out terrorist strikes, there seems to be a marked preference for these days. With the Bangalore blasts on Friday, the list has further grown.
But is there a reason why these two days are preferred over others by the merchants of death? According to political scientist Imtiaz Ahmed, terrorism is a rational act and terrorists have targets and purpose. ‘‘If they think that committing an act of terrorism on a particular day would help them project a certain image and win the community’s sympathy and support, they will do it,’’ he says.  
Ahmed, also an Islamic scholar, adds: ‘‘For them, Friday becomes a symbolic instrument to deliver a message that it is a Muslim act.  . . Friday is a sacred day for Muslims. And traditionally on Tuesdays Hanuman bhakts go to temples. These are days of large congregation".
Security specialist P R Chari says when a blast happens near or outside a temple on Tuesday, it means that the terrorists want to wreak maximum havoc on their intended targets.