Japanese Sci-Fi / Anime tradition has weird things with regards to near-future dates. Such as the end of the world in 2000 (1st impact) then 2012 (Evangelion). Or British Mechas take over Japan to call it Area 11 (Code Geass), Or Sword Art Online happening in 2022.
There's also that weird Eden of the East anime that took place in 2010 (when the anime was released in 2009), that predicted that cell phones can do everything in the next year.
Sometimes, its more fun to imagine near-future Sci-Fi. I'd honestly put something like "Stargate SG-1" (from the 90s) akin to this style of SciFi. I don't think anyone was saying we'd have faster-than-light travel figured out from ancient alien artifacts in the 90s (despite the show taking place in the 90s).
My understanding is that the main plot actually takes place in the 1960s, not the near future. The timeline is a little confusing because of the alt history/calendar aspect of the Geass universe.