Hello I'm trying to use boost::date_time to format the date and time (with fractional seconds) in RFC3339 format http://tools.ietf.org/html/rfc3339. I'd like my date to look like "1996-12-19T16:39:57.76-08:00". date +'%FT%T.%N%:z' gives me the format that I want 2010-12-17T17:09:41.079937078+01:00 The boost/C++ code at the end of this message gives me 2010-12-17T16:10:03.141889Z this is the correct time but I want the time in my time zone with an indication of the time zone (+0100) not in UTC with a "Z". Can anyone give me a hint? Another question, is there anyway to control the number of decimals after the point for the seconds? thanks Stuart #include <boost/date_time.hpp> std::cout.imbue(std::locale(std::cout.getloc(), new boost::local_time::local_time_facet("%Y-%m-%dT%H:%M:%S%F%Q"))); std::cout << boost::local_time::local_microsec_clock::local_time(boost::local_time::time_zone_ptr()) << std::endl;