Using "date +%s" I can get the number of seconds since the epoch.
Fine. I now want to convert it back to a date. The manual states
that I can do so:
> To convert such an unwieldy number of seconds back to a more
> readable form, use a command like this:
>
> date -d '1970-01-01 946684800 sec' +"%Y-%m-%d %T %z"
> 2000-01-01 00:00:00 +0000
Reading this, I would expect that
date; date -d "1970-01-01 `date +%s` sec"
would produce two equal lines (unless I run the commands just as the
clock ticks). However, there is a 1-hour difference:
Fri Aug 16 15:34:52 MEST 2002
Fri Aug 16 14:34:52 MEST 2002
If I set TZ=GMT and re-run the commands, I get the expected result:
Fri Aug 16 13:35:28 GMT 2002
Fri Aug 16 13:35:28 GMT 2002
TZ was unset when I ran the first commands.
I have tested this under Linux 2.4.18pre1 using glibc-2.2.5, and under
Solaris 2.8.
Daylight savings time is currently in effect. I'm 1 hour from UTC.
/ceder
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