Hi, I'm trying to simply set the log format of the sinks using a string. For example from a config file or just in code. Take for instance this simple line taken from the basic_example (https://github.com/boostorg/log/blob/master/example/basic_usage/ main.cpp) logging::add_console_log(std::clog, keywords::format = "%TimeStamp%: %Message%"); Whenever I add %Timestamp% to the log format, I keep getting this error: terminate called after throwing an instance of 'boost::exception_detail::clone_implboost::gregorian::bad_year

' what(): Year is out of valid range: 1400..10000

I can easily reproduce this by running these examples (without modification): https://github.com/boostorg/log/blob/master/example/basic_usage/ main.cpp https://github.com/boostorg/log/blob/master/example/ settings_file/main.cpp Am I doing something wrong? I have this same behaviour on both boost1.62 and boost1.65. The former as installed from the debian package manager. The latter was manually compiled... -Dirk