Why value returned by 'time' command is not influenced by changes to the environment variable TZ,

print "T1:" . time . "\n";
print "TZ:$ENV{TZ}\n";
my ($l_cur_tz) = $ENV{TZ};
$ENV{TZ}= 'GMT-8';
print "T2:" . time . "\n";
print "TZ:$ENV{TZ}\n";
$ENV{TZ}= $l_cur_tz;

--- o/p -----
T1:1196655462
TZ:US/Eastern
T2:1196655462
TZ:GMT-8

the value of time always remains the same, someone please explain this behavior.

In reply to 'time' command & $ENV{TZ} by needperlhelp

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