Blocking an IP for 23 hours

One of the issues I have, running a blog site I own, is that there are certain automated entities on the Internet that likes to poll my website every half an hour, every hour, for updates.
The problem I have with this, is that I've never updated my blog every half an hour, for 24 hours, every day.

So, recently, I came across a firewall setting that allows me to specify the start and stop time of the rule. It seems to me then, it's possible to block specific IPs, or IP ranges, for nearly 24 hours, and allow these traffic to go through only for an hour every day.

So, here's the rules I've written. The first rule, drops traffic from midnight to 3pm, and the second rule, drops traffic from 4pm to midnight. This essentially allows the given IPs to connect during 3-4pm.

config rule
        option src 'wan'
        option dest 'lan'
        option proto 'tcp'
        option family 'ipv4'
        option src_ip 'xx.xx.xx.xx'
        option dest_port '80 443'
        option target 'DROP'
        option name 'Block xx.xx.xx.xx-1'
        option enabled '1'
        option start_time '00:00:00'
        option stop_time '15:00:00'

config rule
        option src 'wan'
        option dest 'lan'
        option proto 'tcp'
        option family 'ipv4'
        option src_ip 'xx.xx.xx.xx'
        option dest_port '80 443'
        option target 'DROP'
        option name 'Block xx.xx.xx.xx-2'
        option enabled '1'
        option start_time '16:00:00'
        option stop_time '00:00:00'