Just a suggestion: We like to compile with lots of warning turned on and try to strive for warning free builds. Under gcc, with the -Wall -W options, we get a lot of "warning: unused parameter" warnings with the date_time library. For example, /usr/include/boost-1_33/boost/date_time/time_facet.hpp:202: warning: unused parameter 'a_ref' It looks like a lot of these could be fixed by /* commenting out */ the unused parameter names; e.g. explicit time_facet(::size_t /* a_ref */ = 0) ... Thanks.