No.13118032 ViewReplyOriginalReport
Turn 14- Geass Hunt 「ギアス 狩り」, July 13th
Turn 15- The World Of C「C の 世界」 , July 20th
Turn 16- Union of Nations, Resolution No.1 「超合集国決議第壱號」 , July 27th
Turn 17- The Taste of Soil 「土 の 味」 , August 3rd

So Turn 18 is on August 10, 2009. One year before the beginning of Geass.

Oh and August 10 is also the date that the Japs decided to surrender. Proof that Geass is just an attempt at them trying to get over their butthurt 64 years ago.