--- /dev/null
+<?php
+
+namespace Drupal\system\Plugin\migrate\process\d6;
+
+use Drupal\migrate\MigrateExecutableInterface;
+use Drupal\migrate\ProcessPluginBase;
+use Drupal\migrate\Row;
+
+/**
+ * Process the D6 Timezone offset into a D8 compatible timezone name.
+ *
+ * @MigrateProcessPlugin(
+ * id = "timezone"
+ * )
+ */
+class TimeZone extends ProcessPluginBase {
+ /**
+ * {@inheritdoc}
+ */
+ public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
+ $offset = $value;
+ // Convert the integer value of the offset (which can be either
+ // negative or positive) to a timezone name.
+ // Note: Daylight saving time is not to be used.
+ $timezone_name = timezone_name_from_abbr('', intval($offset), 0);
+ if (!$timezone_name) {
+ $timezone_name = 'UTC';
+ }
+
+ return $timezone_name;
+ }
+
+}