Description: ------------ Calling setTZ sets the TZ globally instead of only within the date object. See the test script for var_dumps that shows this. Test script: --------------- var_dump(getenv("TZ")); $date = new Date(); $date->setTZ("US/Pacific"); var_dump($date->tz->getOffset($date) / 1000); var_dump(getenv("TZ")); string(0) "" int(-28800) string(10) "US/Pacific" Expected result: ---------------- I expected getenv("TZ") to return "" Actual result: -------------- getenv("TZ") returns "US/Pacific"

Actually, it is getOffset(), not setTZ(), that is setting the TZ env. variable globally. It does this as a side effect, because instead of working out whether the date is in Summer time, it delegates this to the native PHP functions. However, as these work in the machine's local time zone, it needs to set the TZ globally. It is supposed to reset it to the original value, but it does not work properly. In CVS, this implementation is no longer used, so this bug has already been fixed.

Thank you for your bug report. This issue has been fixed in the latest released version of the package, which you can download at http://pear.php.net/get/Date