Some of the maps frequently found in the bases are incorrect for the year the game is set in (1968). The maps that feature individual countries show that the Soviet Union and Yugoslavia have broken up, placing them after 1991, but don't show the split between Sudan and South Sudan, placing them before mid-2011.
According to the calendars in both the RED and BLU bases, the game is set in June 1968. However, the calendars (which run Monday - Sunday, rather than Sunday - Saturday) show June starting on a Wednesday, when in fact it began on a Saturday that year. The nearest year with June starting on a Wednesday is 1966.