$label = $name unless $label;
if ($usedatetime) {
- eval "use DateTime;";
- die $@ if $@;
my $dt = DateTime->from_epoch(epoch => $value, time_zone => 'floating');
- $value = $dt->strftime($format);
+ $value = $dt->strftime($format)
+ unless $value eq '';
}else{
$value = time2str($format, $value);
}