如何使用UTC偏移量获取Perl中的本地时间？

如果我有以下位置，我知道如何使用时区转换获取本地时间：

my $localTime = DateTime->now( time_zone => 'America/New_York' );

但我目前只有UTC时区号，例如：

my $UTCzone = 5;
my $UTCzone = -2;
etc.

在这种情况下如何转换

DateTime->now( time_zone => '+0500' );

perldoc DateTime

说

时区参数可以是标量或DateTime:：TimeZone对象。字符串将作为其“name”参数传递给DateTime:：TimeZone->new方法。该字符串可以是奥尔森DB时区名称（“美国/芝加哥”）、偏移字符串（“+0630”）

perldoc DateTime

说

时区参数可以是标量或DateTime:：TimeZone对象。字符串将作为其“name”参数传递给DateTime:：TimeZone->new方法。该字符串可以是奥尔森DB时区名称（“美国/芝加哥”）、偏移字符串（“+0630”）

---

DateTime接受时区的偏移量。例如，纽约目前处于UTC-0400，因此您可以使用

DateTime->now( time_zone => '-0400' );  # Or -0330, +0100, etc

但请注意，这与提供

美国/纽约

时区不同，因为纽约的DST补偿每年更改两次

$ perl -MDateTime -E'
   for my $time_zone (qw(America/New_York -0400)) {
      my $dt = DateTime->now( time_zone => $time_zone );

      say "Timezone       = $time_zone";
      say "Now            = ", $dt->strftime("%T");
      say "UTC            = ", $dt->clone->set_time_zone("UTC")->strftime("%T");
      $dt->add( months => 6 );
      say "+6 months      = ", $dt->strftime("%T");
      say "+6 months, UTC = ", $dt->clone->set_time_zone("UTC")->strftime("%T");
      say "";
   }
'
Timezone       = America/New_York
Now            = 19:36:33
UTC            = 23:36:33
+6 months      = 19:36:33
+6 months, UTC = 00:36:33

Timezone       = -0400
Now            = 19:36:33
UTC            = 23:36:33
+6 months      = 19:36:33
+6 months, UTC = 23:36:33

---

DateTime接受时区的偏移量。例如，纽约目前处于UTC-0400，因此您可以使用

DateTime->now( time_zone => '-0400' );  # Or -0330, +0100, etc

但请注意，这与提供

美国/纽约

时区不同，因为纽约的DST补偿每年更改两次

$ perl -MDateTime -E'
   for my $time_zone (qw(America/New_York -0400)) {
      my $dt = DateTime->now( time_zone => $time_zone );

      say "Timezone       = $time_zone";
      say "Now            = ", $dt->strftime("%T");
      say "UTC            = ", $dt->clone->set_time_zone("UTC")->strftime("%T");
      $dt->add( months => 6 );
      say "+6 months      = ", $dt->strftime("%T");
      say "+6 months, UTC = ", $dt->clone->set_time_zone("UTC")->strftime("%T");
      say "";
   }
'
Timezone       = America/New_York
Now            = 19:36:33
UTC            = 23:36:33
+6 months      = 19:36:33
+6 months, UTC = 00:36:33

Timezone       = -0400
Now            = 19:36:33
UTC            = 23:36:33
+6 months      = 19:36:33
+6 months, UTC = 23:36:33