According to several game sites publisher 2K games has stuck release dates on Civilization V.
Civilization V will ship in North America on September 21, 2010 and internationally on September 24 and that's all PC, nothing for Mac mentioned. Steam will be supported, they're even throwing in some extra's when you order the online edition.
More details on the game on the
civilization V website
Well, this time it seems they plan on releasing way before the holiday season. Wonder if that means 2K and Firaxis plan to have the game really working by then or if they're just aiming to get the first patch in before the holiday season.
news on IGN
news on gamespot
news on gamespy