I wrote a near-trivial "timestamp" command to make it easier to do time arithmetic (handy for scheduling a doctor's appointment a 90-day medicine supply from now). TZ=udt timestamp 119 11 04 21 50 06 18204 1572904206 Mon Nov 4 21:50:06 2019 TZ=udt timestamp 0 70 01 01 00 00 00 0 0 Thu Jan 1 00:00:00 1970 TZ=udt timestamp 500000000 85 11 05 00 53 20 5787 500000000 Tue Nov 5 00:53:20 1985 TZ=udt timestamp 1000000000 101 09 09 01 46 40 11574 1000000000 Sun Sep 9 01:46:40 2001 TZ=udt timestamp 1500000000 117 07 14 02 40 00 17361 1500000000 Fri Jul 14 02:40:00 2017 TZ=udt timestamp 2000000000 133 05 18 03 33 20 23148 2000000000 Wed May 18 03:33:20 2033 TZ=udt timestamp 2500000000 149 03 22 04 26 40 28935 2500000000 Mon Mar 22 04:26:40 2049 Not likely I'll live to see 2500000000. I surely won't live to see a half-billion years. On Mon, Nov 4, 2019 at 4:11 PM Dave Horsfall wrote: > On Tue, 5 Nov 2019, Dave Horsfall wrote: > > > UNIX was half a billion (500000000) seconds old on Tue Nov 5 00:53:20 > > 1985 GMT (measuring since the time(2) epoch). > > Aarrgghh! The subject should read "seconds", of course (too much blood in > my coffee stream). > > -- Dave >