Hi all! I'm using boost::posix_time::second_clock::local_time() to retrieve my current local time, and then using operator<< to stream the resulting ptime. I'd like to add to the output my local time zone (as configured in the underlying OS). Be it just a time difference or (better) a region (like "America/New_York"). I have been looking but didn't find how to to it. The class ptime doesn't include the time zone; and all the other examples I've seen in to docs work with an explicitly used time zone in the code. For example: time_zone_ptr zone( new posix_time_zone("MST-07") ); local_date_time ldt = local_sec_clock::local_time(zone); And, for instance, in the docs about I/O it can be seen "%q ISO time zone (output only). This flag is ignored when using the time_facet with a ptime.". There's also a boost::date_time::c_local_adjustor (which warns about "This class assumes that timezone settings of the machine are correct. This can be a very dangerous assumption."), but doesn't help me much. By now, I can use (also) boost::posix_time::second_clock::universal_time() to infer my time zone. Is there any alternative to this? Thanks a lot. -- Rodolfo Federico Gamarra