From: Guenther Grau[SMTP:Guenther.Grau@bk.bosch.de] Sent: Tuesday, April 07, 1998 12:36 PM In my application I need to know, the time difference between any given time in any given timezone, and UTC. Is this possible to do WITHOUT changing the TZ environment variable? Not without some hacking. You could take the public domain tz code <ftp://elsie.nci.nih.gov/pub/>, or the GNU C library code <ftp://ftp.gnu.org/pub/gnu/glibc-2.0.6.tar.gz>, and make a truly reentrant version of the localtime function, so that you can pass the time zone rule as a separate argument to your modified version of localtime. If you do this, please send your improvements to the original authors; you're not the first to have asked about this but nobody has implemented it yet as far as I know.