Re: Command-line-interface (CLI) calculator to work out the difference between 2 dates

[Ron Johnson <ron.l.johnson@cox.net>]

On 08/24/08 10:54, Edward J. Shornock wrote:
[snip]
> While I'm sure someone else will provide a much better way, I've used 
> something like
>
> $ echo $(date  -d 20080824 +%j) - $(date  -d 20080724 +%j) | bc
> 31

That a good idea.  I never knew date(1) could do that.  The problem, 
though, is that it doesn't span years.

$ echo $(date -d 20090824 +%j) - $(date -d 20080724 +%j) | bc
30

Use delta from epoch, instead.
$ echo $[$(date -d 20090824 +%s) - $(date -d 20080724 +%s)]/86400|bc
396

--
Ron Johnson, Jr.
Jefferson LA  USA

"Do not bite at the bait of pleasure till you know there is no
hook beneath it."  -- Thomas Jefferson