When did the roosters win the last grand final?
No context provided
When is the date did the roosters win the 2013 grand final?
October 6,2013
No context provided
When is the date did the roosters win the 2002 grand final?
October 6,2002
List of NRL Grand finals
https://en.wikipedia.org/wiki/List%20of%20NRL%20Grand%20finals
The Sydney Roosters is an Australian professional rugby league football club based in the Eastern Suburbs (Sydney). 
Sydney Roosters
The Sydney Roosters are an Australian professional rugby league football club based in the Eastern Suburbs of Sydney. On October 6,2002 the Roosters won the 2002 Grand Final. The Roosters won the 2013 Grand Final on October 6,2013.