id summary reporter owner description type status milestone component version severity resolution keywords cc 12562 boost::log syslog backend date formatting can have an unwanted extra space tag@… Andrey Semashev "According to RFC3164, the day of month field in the syslog header timestamp should be formatted as two characters: ""If the day of the month is less than 10, then it MUST be represented as a space and then the number. For example, the 7th day of August would be represented as ""Aug 7"", with two spaces between the ""g"" and the ""7"". https://tools.ietf.org/html/rfc3164#section-4.1.2 I have submitted a pull request to fix this. https://github.com/boostorg/log/pull/33" Bugs closed To Be Determined log Boost 1.62.0 Problem fixed