I'm trying to understand the date_time formatting via iostreams but got problems with a few things. I tried to search the archive but didn't find answers to these questions. 1. Why doesn't date_time use the standard time facet (time_put.do_put etc) if the special greg_date_facet isn't available? 2. Why do I need to specify the names of all months and weekdays in the greg_date_facet just to use a different separator than '-' or another ordering? 3. How do I specify the format of a ptime (date-separator, time-separator and decimal separator)? -------------------------------------------- I also got some compile warnings on VC70 (latest CVS) 1: in the function "from_time_t" on this line return start + seconds(t); boost\date_time\posix_time\conversion.hpp(27) warning C4244: 'argument' : conversion from 'time_t' to 'long', possible loss of data 2: in the function "from_stream_type" ss << ss.narrow(*beg++, 'X'); // 'X' will cause exception to be thrown boost\date_time\date_parsing.hpp(211): warning C4244: 'argument' : conversion from 'wchar_t' to 'char', possible loss of data