On what date did the incident on which the film Talvar is based take place ?
Talvar (film):  The film is based on the 2008 Noida double murder case, in which a teenage girl and her family servant were found murdered, and her parents were convicted for the crime. 2008 Noida double murder case:  The two were killed on the night of 15–16 May 2008 at Aarushi's home.
night of 15–16 May 2008