[syslog-ng] Closing destination file when date changes.

Hello. I'm using a very simple configuration on Ubuntu 12.04.2 LTS @version: 3.3 @include "scl.conf" source from-network { udp(ip("0.0.0.0") port(514)); }; destination local-file { file("/var/log/temporary-encrypted/$YEAR-$MONTH-$DAY.log"); }; log { source(from-network); destination(local-file);}; Log on a destination file using date as filename. I need to close this file when date changes at 00:00. How? Thanks. Andrea