Since qt_mktime() took QDate and QTime in/out parameters, its callers had to convert the milliseconds they had to that form and back again after. Since it combined optional look-up of zone abbreviation with determination of offset and DST-ness (both ignore when the abbreviation was asked for) it made sense to split it in two. Each takes the millis and whatever knowledge we have of DST. One returns tha abbreviation; the other returns a QDTP::ZoneState for the caller that'll be returning that. Outside the system zone, when we have to fall back to a kludge, their callers can now use the Julian Day number change for its fake date to directly adjust the millis there and back (effectively inlining former conversions to-and-from date and time representation, but optimising out some of the work). Change-Id: I7aa4583171f77fc0f4aa80c8f564e76995ca69d2 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>