On Fri 2015-08-14T20:16:52 -0700, Paul Eggert hath writ:
$ date -u -r -67767978442512096 Tue Jan 1 02:38:24 GMT -2147479778
GNU/Linux 'date' is similar except it says 'UTC' rather than 'GMT' (of course neither abbreviation is correct for these old time stamps).
Of course. Williams studied tidal rhythmites and found a nearly constant number of about 410 solar days per year from 2 billion to 1 billion years before present, which is about 77000 SI seconds in one day. http://onlinelibrary.wiley.com/doi/10.1029/1999RG900016/abstract That doesn't work with a calendar that supposes 365.25 days per year. Any date before human record keeping should decide whether it is counting seconds, days, or years (and which kind of each) because using the modern relationships does not correspond to anything. -- Steve Allen <sla@ucolick.org> WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m