> If you carefully read the following discussion: > http://stackoverflow.com/questions/19170721/real-time-awareness-of-timezone-change-in-localtime-vs-localtime-r > [...] As far as the official documentation goes, 'tzset' is not garanteed to be reentrant. Therefore, automatically calling 'tzset' everytime you are going to call 'localtime_t' seems to defeat the whole point of using 'localtime_t' (instead of 'localtime'). -- Roberto