Ok, we all know TLOBS is a cult classic and one of the best movies ever made on the life of Shaheed Shri Bhagat Singh ji, but please tell me how is 23rd March 1931 Shaheed?

Ok, we all know TLOBS is a cult classic and one of the best movies ever made on the life of Shaheed Shri Bhagat Singh ji, but please tell me how is 23rd March 1931 Shaheed?