Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Problem:Context : The St. Stephen's College massacre (Chinese: ) involved a series of acts of extreme cruelty committed by the Imperial Japanese Army on 25 December 1941 during the Japanese occupation of Hong Kong at St. Stephen's College.
Question : The point in time of St. Stephen's College massacre was what?
Solution:
25 December 1941