(Right now I can see five devices that have been running since March 24th -- 114 days with no restart.)

Only (365.4*200)-114 days to go. :-)

Vernor Vinge (an AI guy who writes intelligent scifi) has a book dealing with millenia-old software (_A Fire Upon the Deep_). Among other puzzles is that no one remembers what epoch 1970 was the start of :-).