999000000

[Ian McCulloch]

On Wed, 29 Aug 2001, Martijn van Oosterhout wrote:

> On Wed, Aug 29, 2001 at 08:03:33AM +1000, Howard Lowndes wrote:
> > Slightly wrong
> > 
> > $ date -u --date="1 jan 1970 + 1000000000 secs"
> > Sat Sep  8 15:46:40 UTC 2001
> > $ date  --date="1 jan 1970 + 1000000000 secs"
> > Sun Sep  9 01:46:40 EST 2001

This is 1 jan 1970 local time, which is 36000 seconds infront of UTC.
try 
$ date -u --date="1 jan 1970 UTC + 1000000000 secs"
Sun Sep  9 01:46:40 UTC 2001
$ date --date="1 jan 1970 UTC + 1000000000 secs"
Sun Sep  9 11:46:40 EST 2001

> 
> Something is wrong here, look:
> 
> $ date --date='Sep  8 15:46:40 UTC 2001' +%s
> 999964000
> $ date --date='Sep  9 01:46:40 2001' +%s
> 999964000

yep

> 
> I worked it out like follows:
> 
> $ perl -e 'print scalar(localtime(1_000_000_000)),"\n"'
> Sun Sep  9 11:46:40 2001
> $ date --date='Sep  9 11:46:40 2001' +%s
> 1000000000
> $ perl -e 'print scalar(gmtime(1_000_000_000)),"\n"'
> Sun Sep  9 01:46:40 2001
> $ date --date='Sep  9 01:46:40 2001 UTC' +%s
> 1000000000
> 
> So who is right?
> 

I guess the 'real' zero is in UTC ?

Cheers,
Ian McCulloch