[fanf2]

Five digit Gregorian years are a https://longnow.org/ thing, tho when a few millennia are not enough I prefer the holocene calendar https://en.m.wikipedia.org/wiki/Holocene_calendar

[kragen]

my concern with the holocene calendar is that it introduces unwanted ambiguity in assertions like "we expect two meters of sea level rise by the year 12124". is that in 100 years or 10100 years?

admittedly most other alternatives like the buddhist, hebrew, discordian, and assyrian calendars have the same problem, but worse