"Polder, Matthew J" <matthew.j.polder@lmco.com> schrieb im Newsbeitrag news:BAC0789A8076D245A5651F65CCD2192B16184BED5C@HVXMSP5.us.lmco.com... I've found the Date Time library incredibly useful for dealing with timestamps, but I can't seem to get the output formatted the way I want. I've followed the example for the Date Time IO Tutorial (http://www.boost.org/doc/libs/1_39_0/doc/html/date_time/date_time_io.html#da...) but the output always comes out the same way. I've tried the following code with Visual Studio Express 2008 and g++ 4.2 on Solaris 10. I'm using Boost 1.39.0. Any help appreciated. matthew #include <fstream> #include <functional> #include <iostream> #include <sstream> #include "boost/date_time/gregorian/gregorian.hpp" #include "boost/date_time/posix_time/posix_time.hpp" #include "boost/date_time/local_time/local_time.hpp" using namespace std; int main(int argc, char** argv) { stringstream ss; ifstream in( argv[1] ); string inputFormat = argv[2]; string outputFormat = argv[3]; //I want my own formatting. Would be interesting whats your format string looks like. Not all format flags work with all date_time classes. %z (Time zone) for instance works only with local_date_time. Pirx!