Chris Buechler wrote:
...
> The whole wish list is pretty up in the air, with 1.3 development
> moving (though slowly thus far).  The problem implementing this is
> none of the packet filters currently being considered support this
> natively.  I don't know that any open source packet filters support
> this natively, for that matter.

FYI, Iptables on linux supports time based rules.

-A FORWARD -p tcp --dport http -o eth0 -i eth1 \
   -m time --timestart 12:30 --timestop 13:30 --days \
   Mon,Tue,Wed,Thu,Fri -j ACCEPT