|“||The universe is probably littered with the one-planet graves of cultures which made the sensible economic decision that there's no good reason to go into space--each discovered, studied, and remembered by the ones who made the irrational decision.||”|
—Randall Munroe, xkcd.com, 2 May 2011
The Space Age (abbreviated SA) is an alternate calendar used by many Fen.
Year 0 of the Space Age calendar is 1957 of the Gregorian calendar. This year was chosen because Sputnik I was launched by the Soviet Union on October 4, 0 SA (or October 4, AD 1957). Thus, using the Space Age calendar, the Kandor Treaty was signed on March 28, 53 SA.