Translate to French:

You are at least 18 years old or will be during the 2009-2010 ski season.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Vous avez ou aurez plus de 18 ans au cours de la saison de ski 2009-2010.