ios - 64-bit CFCalendarComposeAbsoluteTime generated unexpected value -

i used below codes generate absolute time in 64-bit app:

cftimezoneref cftz = cftimezonecopydefault(); cfcalendarref cfgd = cfcalendarcreatewithidentifier(kcfallocatordefault, kcfgregoriancalendar);  cfcalendarsettimezone(cfgd, cftz); cfabsolutetime @ = 0.0;  cfcalendarcomposeabsolutetime(cfgd,                               &at,                               "ymdhms",                               year,                               month,                               day,                               hour,                               minute,                               second); 

where year, month, day, hour, minute , second were: 2005, 4, 18, 12, 0, 0.0

but generated absolute time not expected. turned 2005-04-19 13:17:27 pdt.

and go far wrong if added more control, example, locale.

any 1 suffered same issue before? or know api?