-^\w{3} [ :0-9]{11} [._[:alnum:]-]+ dhclient\[[0-9]+\]: DHCPREQUEST
-^\w{3} [ :0-9]{11} [._[:alnum:]-]+ dhcpd: DHCPRELEASE
-^\w{3} [ :0-9]{11} [._[:alnum:]-]+ dhcpd\[[0-9]+\]: Discarding packet with bogus hlen\.$
+^[0-9]{4}-[0-9]{2}-[0-9]{2}T[ .:+0-9]+ [._[:alnum:]-]+ dhclient\[[0-9]+\]: DHCPREQUEST
+^[0-9]{4}-[0-9]{2}-[0-9]{2}T[ .:+0-9]+ [._[:alnum:]-]+ dhcpd: DHCPRELEASE
+^[0-9]{4}-[0-9]{2}-[0-9]{2}T[ .:+0-9]+ [._[:alnum:]-]+ dhcpd\[[0-9]+\]: Discarding packet with bogus hlen\.$