According to this AP article, The year is 2030. Man will walk on Mars if everything goes according to plan, and if the government gives them adequate funding.
NASA plans to send six to eight astronauts. The trip would take six months each way, and they’ll stay there for 18 months. The mission “will give scientists the chance for unique research on everything from looking for other life forms and for the origin of life on Earth to the effects of partial gravity on bone loss.”