Table:
text: 2008 Winnipeg Blue Bombers season
Season schedule
Season schedule
Week Date_ Opponent Score Result_ Attendance Record
1 June 27 vs. Toronto Argonauts 23–16 Loss 26155 0–1
2 July 4 at Montreal Alouettes 38–24 Loss 20202 0–2
3 July 11 vs. BC Lions 42–24 Loss 26735 0–3
4 July 18 at BC Lions 27–18 Loss 37174 0–4
5 July 24 vs. Calgary Stampeders 32–28 Win 26882 1–4
6 Aug 1 at Toronto Argonauts 19–11 Loss 28523 1–5
7 Aug 8 vs. Montreal Alouettes 39–11 Loss 27674 1–6
8 Aug 14 vs. Hamilton Tiger-Cats 37–24 Win 25484 2–6
9 Bye Bye Bye Bye Bye 2–6
10 Aug 31 at Saskatchewan Roughriders 19–6 Loss 30985 2–7

Question: What is the date the opponent is with the Saskatchewan Roughriders for the 2008 Winnipeg Blue Bombers season schedule?