http://www.pcgamer.com/civilization-6-unveils-rise-and-fall-expansion-release-date-set/

Since launch last year, Civilization 6 has drip fed us incremental updates by way of new race DLC, Steam Workshop and mod tools, and a free demo. Now, it's unveiled its Rise and Fall expansion—billed as the "deepest Civilization experience to date".

Due on February 8, 2018, players are tasked with guiding their civ of choice through the ages wherein 'Great Ages' see civilizations entering 'Dark' and 'Golden' periods, depending on your in-game actions. "Rise triumphantly from a Dark Age," says publisher 2K, "and your next Golden Age will be even stronger – a Heroic Age."