Context : Kaliganj massacre (Bengali: কালিগঞ্জ হত্যাকান্ড) refers to the massacre of unarmed Bengali Hindus fleeing to India in Kaliganj market, in the present day Jaldhaka Upazila of Nilphamari District on 27 April 1971. 
Subject : Kaliganj massacre 
Relation : point in time
What is the full date that Kaliganj massacre crashed on?