You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.

Context : Ethiopian Airlines Flight 409 was an international commercial flight scheduled from Beirut to Addis Ababa that plunged into the Mediterranean Sea shortly after takeoff from Rafic Hariri International Airport on 25 January 2010, killing all 90 people on board.
Subject : Ethiopian Airlines Flight 409
Relation : point in time
The date of Ethiopian Airlines Flight 409 was what?