Shorewall rule for a particular time period

I found from the manual for /etc/shorewall/rules that Shorewall can have rules active on a particular time period of each day or particular days of the week or month, or a range defined by dates and times if supported by the kernel and iptables. The following can be checked:

#shorewall show capabilities | grep Time
   Time Match: Available
#rpm -qa | grep shorewall
shorewall-4.4.19.1-2-mdv2011.0.noarch
#uname -r 
2.6.38.7-server-1mnb2

The TIME field should be the 12th field in the rules file (after the CONNLIMIT field and before the HEADERS field). The following creates a rule blocking a local IP address of 192.168.1.100 from accessing internet at 18:45-21:00 every day in my local time (instead of UTC).

#ACTION SOURCE DEST PROTO DEST_PORT SOURCE_PORT ORIGINAL_DEST RATE USER/GROUP MARK CONNLIMIT TIME HEADERS    
DROP loc:192.168.1.100 all all - - - - - - - timestart=18:45&timestop=21:00&localtz

#service shorewall reload 
#iptables -L | grep TIME 
DROP all -- 192.168.1.100 anywhere TIME from 18:45:00 to 21:00:00
DROP all -- 192.168.1.100 anywhere TIME from 18:45:00 to 21:00:00
DROP all -- 192.168.1.100 anywhere TIME from 18:45:00 to 21:00:00
DROP all -- 192.168.1.100 anywhere TIME from 18:45:00 to 21:00:00