freebsd stable - Feb 2007 - is localtime file binary compatible with older releases?

Is the compiled time zone info file binary compatible across FreeBSD  
versions?  I have a couple of 4.x and one 5.x box still on my  
network, and I was wondering if it was possible to just copy the /etc/ 
localtime from a new 6.1 box on to all of them rather than having to  
install the updated zone file port.

In message: <01794015-8EF8-4809-895C-E04CA6DA78F6@khera.org>
            Vivek Khera <vivek@khera.org> writes:
: Is the compiled time zone info file binary compatible across FreeBSD  
: versions?  I have a couple of 4.x and one 5.x box still on my  
: network, and I was wondering if it was possible to just copy the /etc/ 
: localtime from a new 6.1 box on to all of them rather than having to  
: install the updated zone file port.

Yes.

Warner

In article <01794015-8EF8-4809-895C-E04CA6DA78F6@khera.org> you
write:
>Is the compiled time zone info file binary compatible across FreeBSD  
>versions?
It is backwards-compatible across all versions of the Olson timezone
library going back to before there was a FreeBSD, on all platforms,
regardless of architecture (modulo bugs in libc).

-GAWollman