$date{'iso-8601'} = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
- $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
- my $local = $epoch + ((int $1 + ($2/60)) * 3600);
+ my ($tz_sign, $tz_hour, $tz_min) =
+ ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
+ $tz_sign = ($tz_sign eq '-' ? -1 : +1);
+ my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
$date{'hour_local'} = $hour;
$date{'minute_local'} = $min;