There is a bug in the datetime library iostream operators $ /opt2/linux/ix86/bin/g++-4.3.1 -I/opt2/linux/x86_64/include/boost-1_36 -o boost1 boost1.cpp; ./boost1; ./boost1 1; ./boost1 1 2; ./boost1 1 2 3 testing testInputIso ... expected=2005 actual =2005 expected=Sep actual =Sep expected=30 actual =30 expected=18 actual =19 boost1: boost1.cpp:97: void testInputIso(): Assertion `(static_cast<int32_t>(18)) == (ldt.utc_time().time_of_day().hours())' failed. Aborted testing testInputIsoWide ... expected=2005 terminate called after throwing an instance of 'boost::gregorian::bad_year' what(): Year is out of valid range: 1400..10000 Aborted testing testOutputIso ... expected=2005-09-30 19:25:17+01:00 actual =2005-09-30 19:25:17+01:00 expected=2005-09-30 19:25:17-08:00 actual =2005-09-30 19:25:17-08:00 testing testOutputIso OK testing testOutputIsoWide ... expected=2005-09-30 19:25:17+01:00 actual =2005-Sep-30 19:25:17 CET boost1: boost1.cpp:267: void testOutputIsoWide(): Assertion `(iso8859_1<std::string>(str)) == (iso8859_1<std::string>(ss.str()))' failed. Aborted The test is attached. Lothar -- Lothar Werzinger Dipl.-Ing. Univ. framework & platform architect Tradescape Inc. - Enabling Efficient Digital Marketplaces 1754 Technology Drive, Suite 128 San Jose, CA 95110 web: http://www.tradescape.biz