ERROR: Date::Manip unable to determine TimeZone.

CentOS release 6.2 (Final)

logwatch gave me:

ERROR: Date::Manip unable to determine TimeZone. Execute the following command in a shell prompt: perldoc Date::Manip The section titled TIMEZONES describes valid TimeZones and where they can be defined.

Temporary solution was in me case:

export DATE_MANIP=DM5