Well the datamined 4th Age was referred to as Atomic Age. (Which seems reasonable since nukes are The Big thing in terms of pre v post 1950)The more I think about it, they could just combine the two into an "Information Age" if technology wise, they start around 1970 with the invention of home computers and the Internet later.
However I’d imagine it going from ~1960-2060 (ie going to near Future…Tier 3 military being Drone Focused…Mars Colonization being the science win)
So it should include “Information Age” themes (multinational companies, information warfare, population collapse) but also have earlier Cold War theme (no direct war between civs just proxy wars, decolonization, etc)